chore: unpin gha in renovate and update link checker workflow

Signed-off-by: Devin Buhl <devin@buhl.casa>

.github/workflows/release.yaml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+        uses: actions/checkout@v4
 
       - name: Create Release
         shell: bash