Update K-9 Mail to 6.710

metadata/com.fsck.k9.yml

@@ -1240,6 +1240,19 @@ Builds:
     scandelete:
       - build-plugin/build
 
+  - versionName: '6.710'
+    versionCode: 37010
+    commit: '6.710'
+    sudo:
+      - apt-get update
+      - apt-get install -y openjdk-17-jdk-headless
+      - update-alternatives --auto java
+    gradle:
+      - yes
+    output: app/k9mail/build/outputs/apk/release/k9mail-release-unsigned.apk
+    scandelete:
+      - build-plugin/build
+
 MaintainerNotes: |-
     Use output instead of subdir to make gradlew-fdroid correctly determine the gradle version to be used.
     It doesn't work when using subdir because we are two levels deep into the directory structure.