Use sentence case

Author: radarhere

README.md

@@ -95,7 +95,7 @@ This library provides extensive file format support, an efficient internal repre
 
 The core image library is designed for fast access to data stored in a few basic pixel formats. It should provide a solid foundation for a general image processing tool.
 
-## More Information
+## More information
 
 - [Documentation](https://pillow.readthedocs.io/)
   - [Installation](https://pillow.readthedocs.io/en/latest/installation/basic-installation.html)
@@ -107,6 +107,6 @@ The core image library is designed for fast access to data stored in a few basic
 - [Changelog](https://github.com/python-pillow/Pillow/releases)
   - [Pre-fork](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst#pre-fork)
 
-## Report a Vulnerability
+## Report a vulnerability
 
 To report a security vulnerability, please follow the procedure described in the [Tidelift security policy](https://tidelift.com/docs/security).

RELEASING.md

@@ -1,15 +1,15 @@
-# Release Checklist
+# Release checklist
 
 See https://pillow.readthedocs.io/en/stable/releasenotes/versioning.html for
 information about how the version numbers line up with releases.
 
-## Main Release
+## Main release
 
 Released quarterly on January 2nd, April 1st, July 1st and October 15th.
 
 * [ ] Create a new issue and select the "Release" template.
 
-## Point Release
+## Point release
 
 Released as needed for security, installation or critical bug fixes.
 
@@ -39,7 +39,7 @@ Released as needed for security, installation or critical bug fixes.
   git push
   ```
 
-## Embargoed Release
+## Embargoed release
 
 Released as needed privately to individual vendors for critical security-related bug fixes.
 
@@ -63,15 +63,15 @@ Released as needed privately to individual vendors for critical security-related
   git push origin 2.5.x
   ```
 
-## Publicize Release
+## Publicize release
 
 * [ ] Announce release availability via [Mastodon](https://fosstodon.org/@pillow) e.g. https://fosstodon.org/@pillow/110639450470725321
 
 ## Documentation
 
 * [ ] Make sure the [default version for Read the Docs](https://pillow.readthedocs.io/en/stable/) is up-to-date with the release changes
 
-## Docker Images
+## Docker images
 
 * [ ] Update Pillow in the Docker Images repository
   ```bash