👷 Label Dependabot PRs and skip them in auto-label

Dependabot PRs get the dependencies, team infra and no issue required
labels, and auto-label no longer adds them to the triage board.

AI-assisted-by: Claude
Signed-off-by: David Barragán Merino <david.barragan@kaleidos.net>

.github/dependabot.yml

@@ -8,6 +8,10 @@ updates:
     schedule:
       interval: "monthly"
     open-pull-requests-limit: 5
+    labels:
+      - "dependencies"
+      - "team infra"
+      - "no issue required"
     commit-message:
       prefix: ":arrow_up:"
     groups:

.github/workflows/auto-label.yml

@@ -13,6 +13,8 @@ permissions: {}
 
 jobs:
   triage:
+    # Dependabot PRs are labelled by dependabot.yml and do not need triage.
+    if: github.actor != 'dependabot[bot]'
     runs-on: ubuntu-latest
     steps:
       - name: Generate GitHub App token