fix typo in URL

Author: rmosolgo

.github/workflows/website.yaml

@@ -50,7 +50,7 @@ jobs:
       - name: Deploy to GitHub pages via gh-pages branch
         uses: s0/git-publish-subdir-action@master
         env:
-          REPO: git@github.com/rmosolgo/graphql-ruby.git
+          REPO: git@github.com:rmosolgo/graphql-ruby.git
           BRANCH: gh-pages
           FOLDER: gh-pages
           SSH_PRIVATE_KEY: ${{ secrets.DEPLOY_PRIVATE_KEY }}
@@ -88,7 +88,7 @@ jobs:
       - name: Deploy to GitHub pages via gh-pages branch
         uses: s0/git-publish-subdir-action@master
         env:
-          REPO: git@github.com/rmosolgo/graphql-ruby.git
+          REPO: git@github.com:rmosolgo/graphql-ruby.git
           BRANCH: gh-pages
           FOLDER: gh-pages
           SSH_PRIVATE_KEY: ${{ secrets.DEPLOY_PRIVATE_KEY }}