Consistently use pkgdown.yml in docs

Fixes r-lib#2146

NEWS.md

@@ -221,7 +221,7 @@
 * pkgdown can now translate all the text that it generates (#1446): this means 
   that if you have a package where the docs are written in another language, you 
   can match all the pkgdown UI to provide a seamless experience to non-English
-  speakers. Activate the translations by setting the `lang` in `_pkgdown.yaml`:
+  speakers. Activate the translations by setting the `lang` in `_pkgdown.yml`:
 
     ```yaml
     lang: fr
@@ -240,7 +240,7 @@
     an issue and we'll help you get started.
 
 * Template packages can now provide `inst/pkgdown/_pkgdown.yml` which is used
-  as a set of defaults for `_pkgdown.yaml`. It can be used to (e.g.) provide 
+  as a set of defaults for `_pkgdown.yml`. It can be used to (e.g.) provide 
   author definitions, select Bootstrap version and define bslib variables, 
   and customise the sidebar, footer, navbar, etc. (#1499).
 

R/build-articles.R

@@ -22,7 +22,7 @@
 #'
 #' @section Index and navbar:
 #' You can control the articles index and navbar with a `articles` field in
-#' your `_pkgdown.yaml`. If you use it, pkgdown will check that all articles
+#' your `_pkgdown.yml`. If you use it, pkgdown will check that all articles
 #' are included, and will error if you have missed any.
 #'
 #' The `articles` field defines a list of sections, each of which

R/figure.R

@@ -82,7 +82,7 @@ meta_figures <- function(meta = list()) {
 #' ```
 #'
 #' @return
-#' A list containing the entries from the `figures` field in `_pkgdown.yaml`
+#' A list containing the entries from the `figures` field in `_pkgdown.yml`
 #' (see [build_reference()]), with default values added. Computed `width` and
 #' `height` values (in pixels) are also included.
 #' @export

README.Rmd

@@ -57,7 +57,7 @@ This generates a `docs/` directory containing a website. Your `README.md` become
 
 ### pkgdown 2.0.0 and Bootstrap 5
 
-pkgdown 2.0.0 includes an upgrade from Bootstrap 3 to Bootstrap 5, which is accompanied by a whole bunch of minor UI improvements. If you've heavily customised your site, there's a small chance that this will break your site, so everyone needs to explicitly opt-in to the upgrade by adding the following to `_pkgdown.yaml`:
+pkgdown 2.0.0 includes an upgrade from Bootstrap 3 to Bootstrap 5, which is accompanied by a whole bunch of minor UI improvements. If you've heavily customised your site, there's a small chance that this will break your site, so everyone needs to explicitly opt-in to the upgrade by adding the following to `_pkgdown.yml`:
 
 ```yaml
 template:

README.md

@@ -69,7 +69,7 @@ pkgdown 2.0.0 includes an upgrade from Bootstrap 3 to Bootstrap 5, which
 is accompanied by a whole bunch of minor UI improvements. If you’ve
 heavily customised your site, there’s a small chance that this will
 break your site, so everyone needs to explicitly opt-in to the upgrade
-by adding the following to `_pkgdown.yaml`:
+by adding the following to `_pkgdown.yml`:
 
 ``` yaml
 template:

vignettes/customise.Rmd

@@ -17,7 +17,7 @@ knitr::opts_chunk$set(
 ```
 
 This vignette teaches you how to customise the style/design of your pkgdown site.
-We'll start by discussing two techniques that only require tweaks to your `_pkgdown.yaml`: theming (colours and fonts) and layout (content of the navbar, sidebar, footer, ...).
+We'll start by discussing two techniques that only require tweaks to your `_pkgdown.yml`: theming (colours and fonts) and layout (content of the navbar, sidebar, footer, ...).
 We'll then discuss how to add additional HTML and other files.
 Next, we'll discuss how to give multiple sites the same style using a package, then finish up with some workflow advice.
 
@@ -40,7 +40,7 @@ Upgrading to Bootstrap 5 has a low chance of breaking your site unless you were
 
 ## Theming
 
-There are two ways to change the visual style of your site from `_pkgdown.yaml`: using a pre-packaged bootswatch theme or customising theme variables with bslib.
+There are two ways to change the visual style of your site from `_pkgdown.yml`: using a pre-packaged bootswatch theme or customising theme variables with bslib.
 The following sections show you how.
 
 ### Bootswatch themes

vignettes/pkgdown.Rmd

@@ -122,7 +122,7 @@ You can also use `ends_with()` and `matches()`.
 See complete details in `?build_reference`.
 
 While iterating on the reference index you might want to run `pkgdown::build_reference_index()`.
-It just re-builds the index page, making it faster to quickly change `_pkgdown.yaml` and see how it affects your site.
+It just re-builds the index page, making it faster to quickly change `_pkgdown.yml` and see how it affects your site.
 
 ## Articles