Merge pull request #467 from sbt/dependabot/github_actions/actions/checkout-6

Bump actions/checkout from 3 to 6

Author: mkurz

.github/workflows/publish.yml

@@ -13,7 +13,7 @@ jobs:
     if: ${{ github.repository_owner == 'sbt' }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
         with:
           # we don't know what commit the last tag was it's safer to get entire repo so previousStableVersion resolves
           fetch-depth: 0