Nextcloud client: bump to 3.21.0

metadata/com.nextcloud.client.yml

@@ -2074,6 +2074,7 @@ Builds:
 
   - versionName: 3.21.0 RC1
     versionCode: 30210051
+    disable: obsolete RC
     commit: rc-3.21.0-01
     subdir: app
     sudo:
@@ -2091,11 +2092,30 @@ Builds:
     scandelete:
       - app/src/androidTest/assets
 
+  - versionName: 3.21.0
+    versionCode: 30210090
+    commit: stable-3.21.0
+    subdir: app
+    sudo:
+      - apt-get update || apt-get update
+      - apt-get install -y openjdk-11-jdk-headless
+      - update-alternatives --auto java
+    gradle:
+      - generic
+    rm:
+      - user_manual
+    prebuild:
+      - mkdir -p $HOME/.gradle
+      - echo org.gradle.jvmargs=-Xmx9g -XX:MaxMetaspaceSize=512m -XX:+HeapDumpOnOutOfMemoryError
+        > $HOME/.gradle/gradle.properties
+    scandelete:
+      - app/src/androidTest/assets
+
 MaintainerNotes: 'Latest 3 stable version will be kept, RC versions will be directly
     outdated by either a new RC or by a stable version: 3.3.0 RC1 -> 3.3.0 RC2 ->
     3.3.0 (stable)'
 
 AutoUpdateMode: None
 UpdateCheckMode: None
-CurrentVersion: 3.20.3
-CurrentVersionCode: 30200390
+CurrentVersion: 3.21.0
+CurrentVersionCode: 30210090