Update K-9 Mail to 6.717 (beta)

metadata/com.fsck.k9.yml

@@ -1340,6 +1340,19 @@ Builds:
     scandelete:
       - build-plugin/build
 
+  - versionName: '6.717'
+    versionCode: 37017
+    commit: '6.717'
+    subdir: app-k9mail
+    sudo:
+      - apt-get update
+      - apt-get install -y openjdk-17-jdk-headless
+      - update-alternatives --auto java
+    gradle:
+      - yes
+    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.