github-action: use oblt-actions/elastic/active-branches (#40682)

Author: v1v

.github/workflows/bump-elastic-stack-snapshot.yml

@@ -17,7 +17,7 @@ jobs:
       matrix: ${{ steps.generator.outputs.matrix }}
     steps:
       - id: generator
-        uses: elastic/apm-pipeline-library/.github/actions/elastic-stack-snapshot-branches@current
+        uses: elastic/oblt-actions/elastic/active-branches@v1
 
   bump-elastic-stack:
     runs-on: ubuntu-latest

.github/workflows/notify-stalled-snapshots.yml

@@ -22,7 +22,7 @@ jobs:
       matrix: ${{ steps.generator.outputs.matrix }}
     steps:
       - id: generator
-        uses: elastic/apm-pipeline-library/.github/actions/elastic-stack-snapshot-branches@current
+        uses: elastic/oblt-actions/elastic/active-branches@v1
 
   notify:
     runs-on: ubuntu-latest