ci: extract cloudflare's project name into a top level env var

Author: ferferga

.github/workflows/__deploy.yml

@@ -17,6 +17,9 @@ on:
         type: string
         default: frontend
 
+env:
+  CF_PROJECT_NAME: jf-vue
+
 jobs:
   cf-pages:
     name: CloudFlare Pages 📃
@@ -40,7 +43,7 @@ jobs:
         with:
           apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
           accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
-          command: pages deploy dist --project-name=jf-vue --branch=${{ inputs.branch }}
+          command: pages deploy dist --project-name=${{ env.CF_PROJECT_NAME }} --branch=${{ inputs.branch }}
 
   compose-comment:
     name: Compose and push comment 📝