Fix CI checkout: use token auth for git clone

Repo requires authentication; use gitea.token in clone URLs.

Co-authored-by: Cursor <cursoragent@cursor.com>

.github/workflows/release.yaml

@@ -24,7 +24,7 @@ jobs:
     steps:
       - name: Checkout
         run: |
-          git clone --depth=1 https://git.produktor.io/${{ gitea.repository }}.git .
+          git clone --depth=1 https://${{ gitea.actor }}:${{ gitea.token }}@git.produktor.io/${{ gitea.repository }}.git .
           git checkout ${{ gitea.sha }}
 
       - name: Install Helm
@@ -48,7 +48,7 @@ jobs:
     steps:
       - name: Checkout (full history for tags)
         run: |
-          git clone https://git.produktor.io/${{ gitea.repository }}.git .
+          git clone https://${{ gitea.actor }}:${{ gitea.token }}@git.produktor.io/${{ gitea.repository }}.git .
           git fetch --tags
 
       - name: Check if release-worthy changes