bump actions to v4 releases (#38)

Signed-off-by: Bob Callaway <bcallaway@google.com>

.github/workflows/archive.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: "Checkout"
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     - name: "Update Archive"
       uses: martinthomson/i-d-template@v1
@@ -28,6 +28,6 @@ jobs:
         token: ${{ github.token }}
 
     - name: "Save Archive"
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         path: archive.json

.github/workflows/ghpages.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: "Checkout"
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     - name: "Cache Setup"
       id: cache-setup
@@ -30,7 +30,7 @@ jobs:
         date -u "+date=%FT%T" >> $GITHUB_OUTPUT
 
     - name: "Cache References"
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       with:
         path: |
           ${{ steps.cache-setup.outputs.path }}
@@ -53,7 +53,7 @@ jobs:
         token: ${{ github.token }}
 
     - name: "Archive Built Drafts"
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         path: |
           draft-*.html

.github/workflows/publish.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: "Checkout"
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     # See https://github.com/actions/checkout/issues/290
     - name: "Get Tag Annotations"
@@ -46,6 +46,6 @@ jobs:
         make: upload
 
     - name: "Archive Submitted Drafts"
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         path: "draft-*-[0-9][0-9].xml"