try empty default db-version

Author: dennisvang

.github/workflows/maven-verify.yml

@@ -49,7 +49,7 @@ on:
         required: false
         type: number
       db-version:
-        default: 8
+        default: ''
         required: false
         type: number
 

.github/workflows/test-maven-verify.yml

@@ -38,7 +38,7 @@ jobs:
             db-username: 'test'
             db-password: 'test'
             db-port: 54321
-            db-version: 17
+#            db-version: 17
     uses: ./.github/workflows/maven-verify.yml
     with:
       runner: ${{ matrix.runner }}
@@ -48,4 +48,4 @@ jobs:
       db-username: ${{ matrix.db-username || '' }}
       db-password: ${{ matrix.db-password || '' }}
       db-port: ${{ matrix.db-port || 0 }}
-      db-version: ${{ matrix.db-version || 0 }}
+#      db-version: ${{ matrix.db-version || 0 }}