Nightlies fix v4 (#1458) [skip ci]

* another attempt at github actions

* try again

.github/workflows/nightlies.yml

@@ -39,7 +39,7 @@ jobs:
         with:
           images: winglian/axolotl
           tags: |
-            type=raw,value=mytag-{{branch}}-{{date 'YYYYMMDD'}}
+            type=raw,value={{ branch }}-{{ date 'YYYYMMDD' }}
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
       - name: Login to Docker Hub
@@ -96,7 +96,7 @@ jobs:
         with:
           images: winglian/axolotl-cloud
           tags: |
-            type=raw,value=mytag-{{branch}}-{{date 'YYYYMMDD'}}
+            type=raw,value={{ branch }}-{{ date 'YYYYMMDD' }}
       - name: Login to Docker Hub
         uses: docker/login-action@v3
         with: