Build(deps): Bump media3_version from 1.2.0 to 1.2.1

Bumps `media3_version` from 1.2.0 to 1.2.1.

Updates `androidx.media3:media3-exoplayer` from 1.2.0 to 1.2.1
- [Release notes](https://github.com/androidx/media/releases)
- [Changelog](https://github.com/androidx/media/blob/release/RELEASENOTES.md)
- [Commits](https://github.com/androidx/media/compare/1.2.0...1.2.1)

Updates `androidx.media3:media3-ui` from 1.2.0 to 1.2.1
- [Release notes](https://github.com/androidx/media/releases)
- [Changelog](https://github.com/androidx/media/blob/release/RELEASENOTES.md)
- [Commits](https://github.com/androidx/media/compare/1.2.0...1.2.1)

---
updated-dependencies:
- dependency-name: androidx.media3:media3-exoplayer
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: androidx.media3:media3-ui
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

app/build.gradle

@@ -156,7 +156,7 @@ ext {
     roomVersion = "2.6.1"
     workVersion = "2.9.0"
     espressoVersion = "3.5.1"
-    media3_version = "1.2.0"
+    media3_version = "1.2.1"
 }
 
 configurations.configureEach {