build appimage on ubuntu-22.04 instead of 24.04 (#803)

Author: axu2

.github/workflows/package-linux.yml

@@ -23,7 +23,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python