Fix Issue 21?

Hopefully this fixed issue https://github.com/AtHeartEngineering/pse_landingpage/issues/21 where external contributors can't build

.github/workflows/build_dev.yml

@@ -10,8 +10,13 @@ on:
   workflow_dispatch:
 
 
+
 jobs:
   build-and-deploy-dev:
+    permissions: 
+      contents: write
+    concurrency:
+      group: ${{ github.workflow }}-${{ github.ref }}
     runs-on: ubuntu-latest
 
     steps:
@@ -25,6 +30,7 @@ jobs:
 
       - name: Deploy to gh-pages-dev branch
         uses: JamesIves/github-pages-deploy-action@v4.3.3
+        
         with:
           branch: gh-pages-dev
           folder: build