dont rely on JDK patch level as it may break the build

Author: bechte

.github/workflows/buildandtest.yml

@@ -27,7 +27,7 @@ jobs:
         uses: actions/setup-java@v5
         with:
           distribution: "sapmachine"
-          java-version-file: ".java-version"
+          java-version-file: "21"
           cache: "gradle"
       - name: Validate Gradle wrapper
         uses: gradle/actions/wrapper-validation@v5

.github/workflows/code-analysis.yml

@@ -16,7 +16,7 @@ jobs:
         uses: actions/setup-java@v5
         with:
           distribution: "sapmachine"
-          java-version-file: ".java-version"
+          java-version-file: "21"
           cache: "gradle"
       - name: Validate Gradle wrapper
         uses: gradle/actions/wrapper-validation@v5

.github/workflows/dependency-check.yml

@@ -26,7 +26,7 @@ jobs:
         uses: actions/setup-java@v5
         with:
           distribution: "sapmachine"
-          java-version-file: ".java-version"
+          java-version-file: "21"
           cache: "gradle"
       - name: Validate Gradle wrapper
         uses: gradle/actions/wrapper-validation@v5