update workflow to use jdk 11 (#21912)

Author: wing328

.github/workflows/samples-jaxrs.yaml

@@ -42,7 +42,7 @@ jobs:
       - uses: actions/setup-java@v5
         with:
           distribution: 'temurin'
-          java-version: 8
+          java-version: 11
       - name: Cache maven dependencies
         uses: actions/cache@v4
         env:

samples/server/petstore/jaxrs-spec-microprofile-openapi-annotations/.openapi-generator-ignore

@@ -21,3 +21,7 @@
 #docs/*.md
 # Then explicitly reverse the ignore rule for a single file:
 #!docs/README.md
+#
+#
+#
+#