Update publish.yml to v4 cache, not checkout

Author: dgpetrie

.github/workflows/publish.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: "Checkout"
-      uses: actions/checkout@v4
+      uses: actions/checkout@v2
 
     # See https://github.com/actions/checkout/issues/290
     - name: "Get Tag Annotations"
@@ -25,7 +25,7 @@ jobs:
         date -u "+::set-output name=date::%FT%T"
 
     - name: "Cache References"
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       with:
         path: |
           ${{ steps.cache-setup.outputs.path }}