set ubuntu-20.04

Author: yhrytsai-atl

.github/workflows/dyn-matrices.yml

@@ -85,7 +85,7 @@ jobs:
   integration-tests-confluence:
     name: Confluence
     needs: [prepare, run-tests]
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     strategy:
       matrix: ${{ fromJSON(needs.prepare.outputs.confluence-it-matrix) }}
       fail-fast: false
@@ -119,7 +119,7 @@ jobs:
   integration-tests-bitbucket:
     name: Bitbucket
     needs: [prepare, run-tests]
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     strategy:
       matrix: ${{ fromJSON(needs.prepare.outputs.bitbucket-it-matrix) }}
       fail-fast: false