add missing dependencies from release workflow

Author: benney

.github/workflows/release.yml

@@ -19,6 +19,13 @@ jobs:
         with:
           submodules: true
 
+      - name: install build dependencies (Ubuntu)
+        run: sudo apt update && sudo apt install -y libisal-dev
+        if: runner.os == 'Linux'
+      - name: install build dependencies (MacOS)
+        run: brew install isa-l
+        if: runner.os == 'macOS'
+
       # Setup the build machine with the most recent versions of CMake and Ninja. Both are cached if not already: on subsequent runs both will be quickly restored from GitHub cache service.
       - uses: lukka/get-cmake@latest
       - name: Restore from cache the dependencies and generate project files