Fix Build&Deploy action: update package list before installing libkrb5-dev

.github/workflows/main.yml

@@ -18,6 +18,7 @@ jobs:
       - name: Install and Build 🔧 # This example project is built using npm and outputs the result to the 'build' folder. Replace with the commands required to build your project, or remove this step entirely if your site is pre-built.
         working-directory: frontend
         run: |
+          sudo apt-get update
           sudo apt-get install libkrb5-dev -y
           npm install
           npm run predeploy