Fix a broken link and add some more info about it

Author: mahozad

README.md

@@ -22,7 +22,7 @@ The Markdown, HTML, and plain text version of the release notes can be downloade
 in the *Assets* section at the bottom of the GitHub release page.
 
 You can find the [original AndroidX GitHub repository here] (and [its AOSP source here]).  
-See the file *[generateReleaseNotes.py]* for how the release notes are generated.
+See the file *[generateReleaseNotes.py]* for how the release notes are generated (deleted in commit [`bd0e7d3`](https://github.com/androidx/androidx/commit/bd0e7d36a49e83974c9cca55044dd84d5779fd93); see [this](https://github.com/androidx/androidx/blob/1cba44b5b1d14aca5441452374fb809c7d1044e8/buildSrc/public/src/main/kotlin/androidx/build/BuildServerConfiguration.kt#L96)).
 
 ### Similar repositories and apps:
   - [Now in Android]: Official application from Android's team; keep up-to-date with the world of Android
@@ -36,7 +36,7 @@ See the file *[generateReleaseNotes.py]* for how the release notes are generated
   [AndroidX (Jetpack) libraries]: https://developer.android.com/jetpack/androidx/versions
   [original AndroidX GitHub repository here]: https://github.com/androidx/androidx
   [its AOSP source here]: https://android.googlesource.com/platform/frameworks/support/
-  [generateReleaseNotes.py]: https://github.com/androidx/androidx/blob/androidx-main/development/release-notes/
+  [generateReleaseNotes.py]: https://github.com/androidx/androidx/blob/859aae63bdb92645d03acdc741a2edafb0c6ce5d/development/release-notes/generateReleaseNotes.py
   [Now in Android]: https://github.com/android/nowinandroid
   [Jetpack Release Tracker]: https://github.com/lmj0011/jetpack-release-tracker
   [Separate release notes for each library]: https://github.com/androidx-releases