Update workflow: runs-on ubuntu-22.04

Author: nevenz

.github/workflows/android-build-master.yml

@@ -12,7 +12,7 @@ on:
 jobs:
   build:
     name: Generate APK
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
 
     steps:
       - uses: actions/checkout@v2