fix: change runner labels from runners-privilegedescalation to ubuntu-latest

Change runs-on in renovate-app-token.yaml and renovate.yaml workflows
from runners-privilegedescalation to ubuntu-latest.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

.github/workflows/renovate-app-token.yaml

@@ -9,7 +9,7 @@ on:
 
 jobs:
   app-token:
-    runs-on: runners-privilegedescalation
+    runs-on: ubuntu-latest
     outputs:
       token: ${{ steps.app-token.outputs.token }}
     steps:

.github/workflows/renovate.yaml

@@ -5,7 +5,7 @@ on:
   workflow_dispatch:
 jobs:
   renovate:
-    runs-on: runners-privilegedescalation
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
       - name: Generate GitHub App token