fixed ubuntu 18 python version in release

Author: k4yt3x

.github/workflows/release.yml

@@ -61,10 +61,10 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt-get install -y python3-pip python3-venv libvulkan-dev swig
-          pip install build
+          pip3 install build
       - name: Build
         run: |
-          python -m build -w .
+          python3 -m build -w .
       - name: Package
         run: |
           mkdir -p ${{ env.PACKAGENAME }}