Update common Prometheus files (#850)

Signed-off-by: prombot <prometheus-team@googlegroups.com>

.github/workflows/approve-workflows.yml

diff --git a/.github/workflows/approve-workflows.yml b/.github/workflows/approve-workflows.yml
index adbcb48..f372012 100644
--- a/.github/workflows/approve-workflows.yml
+++ b/.github/workflows/approve-workflows.yml
@@ -15,13 +15,13 @@
     if: >-
       github.event.issue.pull_request &&
       github.event.comment.body == '/workflow-approve' &&
-      github.repository_owner == 'prometheus'
+      (github.repository_owner == 'prometheus' || github.repository_owner == 'prometheus-community')
     runs-on: ubuntu-latest
     permissions:
       actions: write
       contents: read
       pull-requests: write
     steps:
-      - uses: prometheus/promci/approve_workflows@370e8c15dcec50043cbe66f2f34633d9efc0a190
+      - uses: prometheus/promci/approve_workflows@370e8c15dcec50043cbe66f2f34633d9efc0a190 # v0.9.0
         with:
           github_token: ${{ github.token }}