chore: fetch Flutter directly

.gitea/workflows/deploy.yml

@@ -12,17 +12,22 @@ jobs:
     runs-on: ubuntu-latest
     if: github.ref == 'refs/heads/main'
     steps:
-      - uses: actions/checkout@v4
-      - uses: https://github.com/subosito/flutter-action@1a449444c387b1966244ae4d4f8c696479add0b2
-        with:
-          flutter-version: 3.44.1
-          channel: stable
-          cache: true
+      - name: Check out the code
+        uses: actions/checkout@v4
+      - name: Get Flutter 3.44.1
+        run: |
+          git clone --depth 1 --branch 3.44.1 https://github.com/flutter/flutter.git "$RUNNER_TEMP/flutter"
+          echo "$RUNNER_TEMP/flutter/bin" >> "$GITHUB_PATH"
+          "$RUNNER_TEMP/flutter/bin/flutter" config --no-analytics --no-cli-animations
 
-      - run: flutter pub get --enforce-lockfile
-      - run: flutter analyze
-      - run: flutter test
-      - run: flutter build web --release
+      - name: Install packages
+        run: flutter pub get --enforce-lockfile
+      - name: Analyze
+        run: flutter analyze
+      - name: Run tests
+        run: flutter test
+      - name: Build the web app
+        run: flutter build web --release
 
       - name: Put it live on the VPS
         env: