Update upstream.yml

Update branch regex and checkout version

Signed-off-by: Dale Haiducek <[email protected]>

.github/workflows/upstream.yml → .github/workflows/upstream-refs.yml

@@ -4,7 +4,7 @@ on:
   pull_request:
     branches:
       - main
-      - release-2.[5-9]
+      - release-[0-9]+.[0-9]+
 
 defaults:
   run:
@@ -19,13 +19,13 @@ jobs:
     name: Upstream reference checks
     steps:
     - name: Checkout propagator
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
       with:
         path: governance-policy-propagator
         fetch-depth: 0 # Fetch all history for all tags and branches
 
     - name: Checkout Policy Framework
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
       with:
         path: governance-policy-framework
         repository: stolostron/governance-policy-framework