workflow: fix missing dependency

Signed-off-by: He Xian <[email protected]>

.github/workflows/build.yml

@@ -24,7 +24,7 @@ jobs:
     - uses: actions/checkout@v3
 
     - name: Install dependencies
-      run: sudo apt-get update && sudo apt-get install -y libev-dev libsodium-dev
+      run: sudo apt-get update && sudo apt-get install -y libjson-c-dev libev-dev libsodium-dev
 
     - name: Configure CMake
       # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.