ci: fix

Author: uvlad7

.github/workflows/main.yml

@@ -30,7 +30,7 @@ jobs:
         ruby-version: ${{ matrix.ruby }}
         bundler-cache: true
     - name: Install libraries
-      run: sudo apt install -y libyajl2 libyajl-dev
+      run: sudo apt install -y libyajl2 libyajl-dev valgrind
     - name: Run the default task
       run: bundle exec rake
     - name: Run valgrind