Rename s/GHHELPER_REPO/GITHUB_REPO/ constant

For consistency with our other repos

fastlane/Fastfile

@@ -47,8 +47,8 @@ CODE_SIGNING_STORAGE_OPTIONS = {
   s3_region: 'us-east-2'
 }.freeze
 
-GHHELPER_REPO = 'Automattic/pocket-casts-ios'
-GITHUB_URL = "https://github.com/#{GHHELPER_REPO}".freeze
+GITHUB_REPO = 'Automattic/pocket-casts-ios'
+GITHUB_URL = "https://github.com/#{GITHUB_REPO}".freeze
 DEFAULT_BRANCH = 'trunk'
 
 SCHEME = 'pocketcasts'
@@ -331,7 +331,7 @@ platform :ios do
     # We cannot use the `copy_branch_protection` action here yet, as it would create a branch protection rule with the same
     # restrictions we have in `trunk`, and the release managers wouldn't be able to push due to permissions.
     # This should be changed only when we have PCiOS releases done on CI, when the CI bot is the one running `git push`.
-    set_branch_protection(repository: GHHELPER_REPO, branch: release_branch_name)
+    set_branch_protection(repository: GITHUB_REPO, branch: release_branch_name)
 
     # Move still-open PRs to next milestone, then add frozen marker to milestone title
     update_milestone
@@ -425,9 +425,9 @@ platform :ios do
     UI.success "Done! New Build Code: #{build_code_current}"
 
     # Wrap up
-    remove_branch_protection(repository: GHHELPER_REPO, branch: release_branch_name)
-    set_milestone_frozen_marker(repository: GHHELPER_REPO, milestone: release_version_current, freeze: false)
-    close_milestone(repository: GHHELPER_REPO, milestone: release_version_current)
+    remove_branch_protection(repository: GITHUB_REPO, branch: release_branch_name)
+    set_milestone_frozen_marker(repository: GITHUB_REPO, milestone: release_version_current, freeze: false)
+    close_milestone(repository: GITHUB_REPO, milestone: release_version_current)
 
     # Start the build
 
@@ -461,7 +461,7 @@ platform :ios do
     UI.important "Publishing release #{version_number} on GitHub"
 
     publish_github_release(
-      repository: GHHELPER_REPO,
+      repository: GITHUB_REPO,
       name: version_number
     )
 
@@ -734,7 +734,7 @@ platform :ios do
 
     UI.message("Creating #{version} release on GitHub...")
     set_github_release(
-      repository_name: GHHELPER_REPO,
+      repository_name: GITHUB_REPO,
       api_token: get_required_env!('GITHUB_TOKEN'),
       name: version,
       tag_name: version,
@@ -1193,15 +1193,15 @@ platform :ios do
     begin
       # Move PRs to next milestone
       moved_prs = update_assigned_milestone(
-        repository: GHHELPER_REPO,
+        repository: GITHUB_REPO,
         from_milestone: new_version,
         to_milestone: next_version,
         comment: "Version `#{new_version}` has now entered code-freeze, so the milestone of this PR has been updated to `#{next_version}`."
       )
 
       # Add ❄️ marker to milestone title to indicate we entered code-freeze
       set_milestone_frozen_marker(
-        repository: GHHELPER_REPO,
+        repository: GITHUB_REPO,
         milestone: new_version
       )
     rescue StandardError => e
@@ -1225,7 +1225,7 @@ platform :ios do
                        "👍 No open PR were targeting `#{new_version}` at the time of code-freeze"
                      else
                        "#{moved_prs.count} PRs targeting `#{new_version}` were still open and thus moved to `#{next_version}`:\n" \
-                         + moved_prs.map { |pr_num| "[##{pr_num}](https://github.com/#{GHHELPER_REPO}/pull/#{pr_num})" }.join(', ')
+                         + moved_prs.map { |pr_num| "[##{pr_num}](https://github.com/#{GITHUB_REPO}/pull/#{pr_num})" }.join(', ')
                      end
     buildkite_annotate(style: moved_prs.empty? ? 'success' : 'warning', context: 'start-code-freeze', message: moved_prs_info) if is_ci
   end
@@ -1234,7 +1234,7 @@ platform :ios do
   #
   def create_backmerge_pr
     create_release_backmerge_pull_request(
-      repository: GHHELPER_REPO,
+      repository: GITHUB_REPO,
       source_branch: release_branch_name,
       default_branch: DEFAULT_BRANCH,
       labels: ['Releases'],
@@ -1320,7 +1320,7 @@ platform :ios do
     )
 
     comment_on_pr(
-      project: GHHELPER_REPO,
+      project: GITHUB_REPO,
       pr_number: Integer(ENV.fetch('BUILDKITE_PULL_REQUEST', nil)),
       reuse_identifier: 'prototype-build-link-pocket-casts',
       body: comment_body