Bump Maven to 3.9.7 on GH build

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

@@ -49,7 +49,7 @@ jobs:
           cache: 'maven'
 
       - name: Set up Maven
-        run: mvn --errors --batch-mode --show-version wrapper:wrapper "-Dtype=only-script" "-Dmaven=3.9.6"
+        run: mvn --errors --batch-mode --show-version wrapper:wrapper "-Dtype=only-script" "-Dmaven=3.9.7"
 
       - name: Running integration tests
         run: "./mvnw -B clean install -Prun-its,embedded -Dmaven.repo.local=`pwd`/repo"

its/core-it-support/core-it-plugins/maven-it-plugin-class-loader/maven-it-plugin-class-loader/pom.xml

@@ -80,6 +80,13 @@ under the License.
 
   <build>
     <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-plugin-plugin</artifactId>
+        <configuration>
+          <goalPrefix>class-loader</goalPrefix>
+        </configuration>
+      </plugin>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>

its/pom.xml

@@ -71,8 +71,8 @@ under the License.
     <maven.site.path>core-its</maven.site.path>
     <maven.site.cache>${user.home}/maven-sites</maven.site.cache>
     <rat.ignoreErrors>true</rat.ignoreErrors>
-    <maven.compiler.source>1.8</maven.compiler.source>
+    <maven.compiler.source>8</maven.compiler.source>
-    <maven.compiler.target>1.8</maven.compiler.target>
+    <maven.compiler.target>8</maven.compiler.target>
 
     <maven-version>3.8.6</maven-version>
     <maven-plugin-tools-version>3.6.4</maven-plugin-tools-version>