update github action runtime (#20768)

Author: iQQBot

.github/workflows/team-labeler.yml

@@ -5,7 +5,7 @@ on:
 jobs:
   label:
     name: Apply team labels
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
       - name: Set team labels as output
         id: team_labels

.github/workflows/update-image-digest.yml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     permissions:
       contents: write
       pull-requests: write