ci: add cmake to Linux build dependencies

Required by symphonia-adapter-libopus which bundles and compiles
libopus from source via CMake.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.github/workflows/release.yml

@@ -125,7 +125,7 @@ jobs:
           sudo apt-get update
           sudo apt-get install -y \
             libwebkit2gtk-4.1-dev libappindicator3-dev librsvg2-dev patchelf \
-            libasound2-dev squashfs-tools
+            libasound2-dev squashfs-tools cmake
 
       - name: setup node
         uses: actions/setup-node@v5