ci: name unnamed GHA workflows (#13162)

.github/workflows/backport-reminder.yml

@@ -1,6 +1,8 @@
 # This workflow sends a reminder comment to PRs that have labels starting with
 # `backport/` to check that the backport has run successfully.
 
+name: Backport Assistant Reminder
+
 on:
   pull_request:
     types: [ labeled ]

.github/workflows/changelog-checker.yml

@@ -1,6 +1,8 @@
 # This workflow checks that there is either a 'pr/no-changelog' label applied to a PR
 # or there is a .changelog/<pr number>.txt file associated with a PR for a changelog entry
 
+name: Changelog Checker
+
 on:
   pull_request:
     types: [opened, synchronize, labeled]

.github/workflows/load-test.yml

@@ -1,3 +1,5 @@
+name: Load Test
+
 on:
   pull_request:
     branches:

.github/workflows/website-checker.yml

@@ -10,6 +10,8 @@
 # in the PR and if they need to be cherry-picked to the stable-website branch, the
 # 'type/docs-cherrypick' label needs to be applied.
 
+name: Website Checker
+
 on:
   pull_request_target:
     types: [opened]