fix Windows fixtures and Flatpak CI packaging

.github/workflows/ci.yml

@@ -167,8 +167,7 @@ jobs:
             libxdo-dev \
             libssl-dev \
             build-essential \
-            flatpak \
-            flatpak-builder
+            flatpak
 
       - uses: actions/setup-node@v6
         with:

.github/workflows/release.yml

@@ -240,7 +240,7 @@ jobs:
 
       - run: |
           sudo apt-get update
-          sudo apt-get install -y flatpak flatpak-builder
+          sudo apt-get install -y flatpak
 
       - name: Build the flatpak from the published deb
         env: