Migrate notify teams actions

Author: figi44

.github/workflows/notify-new-issue.yml

@@ -10,6 +10,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Notify new issue
-        uses: ecmwf-actions/notify-teams-issue@v1
+        uses: ecmwf/notify-teams-issue@v1
         with:
           incoming_webhook: ${{ secrets.MS_TEAMS_INCOMING_WEBHOOK }}

.github/workflows/notify-new-pr.yml

@@ -10,6 +10,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Notify new PR
-        uses: ecmwf-actions/notify-teams-pr@v1
+        uses: ecmwf/notify-teams-pr@v1
         with:
           incoming_webhook: ${{ secrets.MS_TEAMS_INCOMING_WEBHOOK }}