install pkg config

Author: Julien-R44

.github/workflows/release.yml

@@ -70,7 +70,7 @@ jobs:
         run: |
           echo ${{ matrix.target.os }}
           sudo apt-get update
-          sudo apt-get install -y --no-install-recommends libssl-dev
+          sudo apt-get install -y --no-install-recommends libssl-dev pkg-config
 
       - name: Install stable toolchain
         uses: actions-rs/toolchain@v1