ci: install nettle-dev to adapt new dependency require

Author: eatradish

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
         rust-version: stable
 
     - name: Install dependencies
-      run: sudo apt-get update && sudo apt-get install -y libssl-dev pkg-config liblzma-dev cmake make
+      run: sudo apt-get update && sudo apt-get install -y libssl-dev pkg-config liblzma-dev cmake make nettle-dev
 
     - uses: actions/checkout@v2
     - name: Build