ci: install libsodium-devel

Author: Duncaen

.github/workflows/ci.yaml

@@ -31,7 +31,7 @@ jobs:
          - name: Prepare container
            run: |
             xbps-install -Syu || xbps-install -yu xbps
-            xbps-install -Sy ${{ matrix.c_compiler }} ${{ matrix.extra_deps }} make pkg-config zlib-devel openssl-devel libarchive-devel kyua atf-devel
+            xbps-install -Sy ${{ matrix.c_compiler }} ${{ matrix.extra_deps }} make pkg-config zlib-devel openssl-devel libarchive-devel kyua atf-devel libsodium-devel
          - name: Build
            env:
               CC: ${{ matrix.c_compiler }}