Grant package write permissions for be-next workflow

This attempts to fix an error in the build_deploy_scicat_backend_next
job

```
#24 ERROR: denied: installation not allowed to Write organization package
------
 > pushing ghcr.io/paulscherrerinstitute/scicat-ci/backend-next:sha-5f02b94cc8ee191467e760d98a50f3be8157be56 with docker:
------
ERROR: denied: installation not allowed to Write organization package
```

.github/workflows/scicat-be-next.yml

@@ -43,6 +43,9 @@ jobs:
      - check_changed
      - set_env
     uses: ./.github/workflows/reusable.build-deploy.yml
+    permissions:
+      contents: read
+      packages: write
     with:
       context: scicat-backend-next/.
       image_name: ${{ github.repository }}/backend-next

.github/workflows/scicat-fe.yml

@@ -1,13 +1,13 @@
 name: scicat-fe
 
-on:  
-  workflow_dispatch: 
+on:
+  workflow_dispatch:
     inputs:
       submodule_commit:
-        description: 'Commit of the submodule to deploy'     
+        description: 'Commit of the submodule to deploy'
         required: false
-      commit: 
-        description: 'Commit of the CI repo to deploy'     
+      commit:
+        description: 'Commit of the CI repo to deploy'
         required: false
   pull_request:
     branches: [ main ]
@@ -18,17 +18,17 @@ on:
 
 jobs:
 
-  set_env: 
+  set_env:
     uses: ./.github/workflows/reusable.environment.yml
-    with: 
+    with:
       commit: ${{ github.event.inputs.commit }}
       submodule_commit: ${{ github.event.inputs.submodule_commit }}
 
   check_changed:
     needs: set_env
     uses: ./.github/workflows/reusable.changes.yml
-    with: 
-      files: | 
+    with:
+      files: |
         .github/workflows/scicat-fe.yml
         helm/configs/frontend/values.yaml
         helm/configs/frontend/login.component.html
@@ -40,11 +40,14 @@ jobs:
 
   build_deploy_scicat_fe:
     if: (needs.check_changed.outputs.changed == 'true' && !needs.set_env.outputs.component) || needs.set_env.outputs.component == 'fe'
-    needs: 
+    needs:
      - check_changed
      - set_env
     uses: ./.github/workflows/reusable.build-deploy.yml
-    with: 
+    permissions:
+      contents: read
+      packages: write
+    with:
       context: frontend/.
       image_name: ${{ github.repository }}/fe
       release_name: frontend