in CI, use new standard scala/cla-checker action (#22203)

Author: hamzaremmal

.github/PULL_REQUEST_TEMPLATE/fix-issue.md

@@ -8,7 +8,7 @@ assignees: ''
 
 <!--
   TODO first sign the CLA
-  https://www.lightbend.com/contribute/cla/scala
+  https://contribute.akka.io/cla/scala
 -->
 
 ## Fix #XYZ

.github/PULL_REQUEST_TEMPLATE/other-pr.md

@@ -8,7 +8,7 @@ assignees: ''
 
 <!--
   TODO first sign the CLA
-  https://www.lightbend.com/contribute/cla/scala
+  https://contribute.akka.io/cla/scala
 -->
 
 ## Description

.github/workflows/cla.yml

@@ -3,20 +3,11 @@ on:
   pull_request:
     branches-ignore:
       - 'language-reference-stable'
-  push:
-    branches:
-      - 'language-reference-stable'
-  merge_group:
-permissions:
-  contents: write
-  pull-requests: write
-
 jobs:
   check:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
-    - run: ./project/scripts/check-cla.sh
-      if: github.event_name == 'pull_request'
-      env:
-        AUTHOR: ${{ github.event.pull_request.user.login }}
+      - name: Verify CLA
+        uses: scala/cla-checker@v1
+        with:
+          author: ${{ github.event.pull_request.user.login }}

docs/_docs/contributing/getting-started.md

@@ -146,6 +146,6 @@ The main development discussion channels are:
 [java11]: https://www.oracle.com/java/technologies/javase-jdk11-downloads.html
 [adopt]: https://adoptopenjdk.net/
 [compat]: https://docs.scala-lang.org/overviews/jdk-compatibility/overview.html
-[scala-cla]: https://www.lightbend.com/contribute/cla/scala
+[scala-cla]: https://contribute.akka.io/cla/scala
 [dotty-issue]: https://github.com/scala/scala3/issues
 [dotty-discussion]: https://github.com/scala/scala3/discussions