Update java-openliberty-gradle devfile (#350)

* Update java-openliberty-gradle devfile

Signed-off-by: dkwon17 <dakwon@redhat.com>

* Update endpoint name and devfile version

Co-authored-by: Theofanis Petkos <thepetk@gmail.com>
Signed-off-by: dkwon17 <dakwon@redhat.com>

---------

Signed-off-by: dkwon17 <dakwon@redhat.com>
Co-authored-by: Theofanis Petkos <thepetk@gmail.com>

stacks/java-openliberty-gradle/devfile.yaml

@@ -15,7 +15,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-schemaVersion: 2.1.0
+schemaVersion: 2.2.2
 metadata:
   name: java-openliberty-gradle
   displayName: Open Liberty Gradle
@@ -30,7 +30,7 @@ metadata:
     - s390x
   projectType: Open Liberty
   language: Java
-  version: 0.4.0
+  version: 0.5.0
   alpha.build-dockerfile: https://github.com/OpenLiberty/devfile-stack/releases/download/open-liberty-gradle-0.3.1/Dockerfile
   alpha.deployment-manifest: https://github.com/OpenLiberty/devfile-stack/releases/download/open-liberty-gradle-0.3.1/app-deploy.yaml
 starterProjects:
@@ -52,9 +52,9 @@ components:
       endpoints:
         - exposure: public
           path: /
-          name: http-gradle
+          name: https-gradle
           targetPort: 9080
-          protocol: http
+          protocol: https
         - exposure: none
           name: debug
           targetPort: 5858