fix(ci): use bash and explicit if conditions to fix skip logic

.gitea/workflows/deploy.yml

@@ -46,10 +46,10 @@ jobs:
 
       - name: 🔍 Environment & Version ermitteln
         id: determine
+        shell: bash
         run: |
           TAG="${{ github.ref_name }}"
-          SHORT_SHA="${{ github.sha }}"
+          SHORT_SHA=$(echo "${{ github.sha }}" | cut -c1-9)
-          SHORT_SHA="${SHORT_SHA:0:9}"
           IMAGE_TAG="sha-${SHORT_SHA}"
           COMMIT_MSG=$(git log -1 --pretty=%s || echo "No commit message available")
 
@@ -169,7 +169,7 @@ jobs:
   build:
     name: 🏗️ Build & Push
     needs: prepare
-    if: needs.prepare.outputs.target != 'skip'
+    if: ${{ needs.prepare.outputs.target != 'skip' }}
     runs-on: docker
     steps:
       - name: Checkout repository
@@ -218,7 +218,7 @@ jobs:
   deploy:
     name: 🚀 Deploy
     needs: [prepare, build, qa]
-    if: needs.prepare.outputs.target != 'skip'
+    if: ${{ needs.prepare.outputs.target != 'skip' }}
     runs-on: docker
     env:
       TARGET:               ${{ needs.prepare.outputs.target }}