Bump version for v2.29.3 release

- Update app versionName to 2.29.3
- Prepare the patch release for the v2.29.3 milestone
- Confirm debug Kotlin compilation succeeds before release

🤖 Auto-generated

Author: OwenMcGirr

app/build.gradle.kts

@@ -20,7 +20,7 @@ android {
         minSdk = 29
         targetSdk = 36
         versionCode = gitVersionCode()
-        versionName = "2.29.2"
+        versionName = "2.29.3"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables {