ci(manual-detached-test): use the ./detached "sub-Action"

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

.github/workflows/manual-detached-test.yml

@@ -6,10 +6,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: ./
+      - uses: ./detached
         with:
           limit-access-to-actor: true
-          detached: true
           connect-timeout-seconds: 60
       - run: |
           echo "A busy loop"