CONTRIBUTING: improve wording about example count limit (tldr-pages#5760

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CONTRIBUTING.md

@@ -30,7 +30,7 @@ To get started, please [sign](https://cla-assistant.io/tldr-pages/tldr) the
 The basic format of a `tldr` page is a set of concrete usage examples.
 Here are a few guidelines to get started:
 
-1. Try to keep pages at around 5 examples. Pages can be longer if needed, but don't exceed 8 examples.
+1. Try to keep pages at around 5 examples. Pages can be longer or shorter when appropriate, but don't exceed 8 examples.
    Remember, it's OK if the page doesn't cover everything; that's what `man` is for.
 2. When in doubt, keep new command-line users in mind. Err on the side of clarity rather than terseness.
    For example, commands that require `sudo` should include it directly in the examples.