Should use https protocol instead of http for repo.jenkins-ci.org/public as well as releases

[nelsonq]

Expected Behavior

make test-pipeline should pass on examples/helper-script

Please describe the expected behavior of the project.

Actual Behavior

make test-pipeline fails on examples/helper-script module on my side.

Please describe what the project is doing instead of the expected behavior

Steps to Reproduce

Please include a numbered list of steps that other people can use to recreate the "Actual Behavior."

1. First Step
   Just run make test-pipeline under examples/helper-script module
   It fails with following error messages.

Additional Information

[ERROR] Failed to execute goal on project jenkinsfile-test-helper-script: Could not resolve dependencies for project com.example:jenkinsfile-test-helper-script:jar:0.0.0-SNAPSHOT: Failed to collect dependencies at org.jenkins-ci.main:jenkins-core:jar:2.102: Failed to read artifact descriptor for org.jenkins-ci.main:jenkins-core:jar:2.102: The following artifacts could not be resolved: org.jenkins-ci.main:jenkins-core:pom:2.102 (present, but unavailable): Could not transfer artifact org.jenkins-ci.main:jenkins-core:pom:2.102 from/to maven-default-http-blocker (http://0.0.0.0/): Blocked mirror for repositories: [jenkins-releases (http://repo.jenkins-ci.org/releases, default, releases+snapshots), jenkins-public (http://repo.jenkins-ci.org/public, default, releases+snapshots)] -> [Help 1]

Provide any additional information that might be helpful, such as steps you've tried to resolve the issue, or observations you've made about the bug.

Once I apply the captioned change, it works to me.

nelson.qiao@EP-ML-11317 helper-script % git diff
diff --git a/examples/helper-script/pom.xml b/examples/helper-script/pom.xml
index e1d28f2..4d44970 100644
--- a/examples/helper-script/pom.xml
+++ b/examples/helper-script/pom.xml
@@ -15,12 +15,12 @@
                <repository>
                        <id>jenkins-releases</id>
                        <name>Jenkins Releases</name>
-                       <url>http://repo.jenkins-ci.org/releases</url>
+                       <url>https://repo.jenkins-ci.org/releases</url>
                </repository>
                <repository>
                        <id>jenkins-public</id>
                        <name>Jenkins Public</name>
-                       <url>http://repo.jenkins-ci.org/public</url>
+                       <url>https://repo.jenkins-ci.org/public</url>
                </repository>
        </repositories>