[ci] Fix protobuf version

Signed-off-by: x7z4w <x7z4w@noreply.codeberg.org>

.github/workflows/android-check.yaml

@@ -27,7 +27,8 @@ jobs:
         shell: bash
         run: |
           sudo apt-get update -y
-          sudo apt-get install -y python3-protobuf
+          sudo apt-get install -y python3-pip
+          pip install "protobuf<3.21" --break-system-packages
 
       - name: Configure repository
         shell: bash
@@ -72,8 +73,9 @@ jobs:
           libxinerama-dev \
           libxcursor-dev \
           libxi-dev \
-          python3-protobuf \
+          python3-pip \
           zlib1g-dev
+          pip install "protobuf<3.21" --break-system-packages
 
       - name: Checkout sources
         uses: actions/checkout@v4