workflows: build: fix apt-get update error

Signed-off-by: Andrea Ricchi <[email protected]>

.github/workflows/build.yml

@@ -2,22 +2,23 @@ name: Build
 
 on:
   push:
-    branches: [ "main" ]
+    branches: ["main"]
   pull_request:
-    branches: [ "main" ]
+    branches: ["main"]
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
-    - name: Installing Qt
-      uses: jurplel/[email protected]
-      with:
-        version: '5.15.2'
-    - name: Run QMake
-      run: qmake
-    - name: Build
-      run: make -j4
+      - uses: actions/checkout@v3
+      - name: Clean apt-get
+        run: sudo apt-get clean && sudo rm -rf /var/lib/apt/lists/*
+      - name: Installing Qt
+        uses: jurplel/install-qt-action@v3
+        with:
+          version: "5.15.2"
+      - name: Run QMake
+        run: qmake
+      - name: Build
+        run: make -j4