Update K-9 Mail to 8.1

metadata/com.fsck.k9.yml

@@ -1512,6 +1512,19 @@ Builds:
     scandelete:
       - build-plugin/build
 
+  - versionName: '8.1'
+    versionCode: 39012
+    commit: b5deccbe8e886048038061e03539ba4f6cbac360
+    subdir: app-k9mail
+    gradle:
+      - yes
+    rm:
+      - feature/funding/googleplay
+    prebuild: sed -i -e '/maven\.mozilla\.org\/maven2/d ; /glean/d ; /app-thunderbird/d
+      ; /googleplay/d' ../settings.gradle.kts
+    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.
@@ -1519,5 +1532,5 @@ MaintainerNotes: |-
 
 AutoUpdateMode: None
 UpdateCheckMode: None
-CurrentVersion: '8.0'
-CurrentVersionCode: 39011
+CurrentVersion: '8.1'
+CurrentVersionCode: 39012