myexpenses - Reenable build with Java 21

metadata/org.totschnig.myexpenses.yml

@@ -2819,9 +2819,13 @@ Builds:
 
   - versionName: 3.9.0
     versionCode: 763
-    disable: https://github.com/mtotschnig/MyExpenses/issues/1583
     commit: 9fff5fb553d1f0476e2fbd0ae91470a949fe8596
     subdir: myExpenses
+    sudo:
+      - echo "deb https://deb.debian.org/debian trixie main" > /etc/apt/sources.list.d/trixie.list
+      - apt-get update
+      - apt-get install -y -t trixie openjdk-21-jdk-headless
+      - update-alternatives --auto java
     output: build/outputs/apk_from_bundle/externRelease/*.apk
     rm:
       - drive