fix: add python3 and python3-pip to Flatpak build workflow dependencies

Author: flavioislima

.github/workflows/flatpak-build.yml

@@ -28,7 +28,7 @@ jobs:
       options: --privileged
     steps:
       - name: install libnss, libatk, libatk-bridge, libcups, libgtk-3
-        run: dnf install nss-tools atk-devel at-spi2-atk-devel cups-devel gtk3-devel make automake gcc gcc-c++ g++ -y
+        run: dnf install nss-tools atk-devel at-spi2-atk-devel cups-devel gtk3-devel make automake gcc gcc-c++ g++ python3 python3-pip -y
       - name: Checkout Repo
         uses: actions/checkout@v4
       - name: Setup NodeJS