fix(docs): small fixes to the docs (NangoHQ#2554)

## Describe your changes
Typo and language fix

## Issue ticket number and link

## Checklist before requesting a review (skip if just adding/editing
APIs & templates)
- [ ] I added tests, otherwise the reason is: 
- [ ] I added observability, otherwise the reason is:
- [ ] I added analytics, otherwise the reason is:

docs-v2/customize/guides/advanced/validate-input-and-output.mdx

@@ -8,7 +8,7 @@ Nango automatically validates your integration inputs & outputs. It also offers
 
 ## Automatic validation
 
-The validation is available during development and production, and do not require any configuration from you:
+The validation is available during development and production, and does not require any configuration from you:
 
 - **CLI**: Dry Run validation errors are logged and will halt execution when using `--validation` command option
 - **Production**: Validation errors are logged but do not halt execution

docs-v2/reference/integration-configuration.mdx

@@ -24,7 +24,7 @@ integrations:
         scopes: # Required scopes.
           - scope1
           - scope2
-        auto_starts: true # If true, data syncing starts when a new connection is created.
+        auto_start: true # If true, data syncing starts when a new connection is created.
         track_deletes: true # If true, automatically detects deleted records (for full refresh syncs only).
         webhook_subscriptions: # The types of webhook this sync handles.
           - subscription1