Update action.yml

Author: HuxyUK

action.yml

@@ -25,7 +25,7 @@ runs:
         sudo apt-add-repository 'deb http://apt.llvm.org/focal/ llvm-toolchain-focal-13 main'
         sudo apt-get update
         sudo apt-get install -y binutils libstdc++6 clang-13 clang-format-13 clang-tidy-13 \
-        llvm-13-dev cmake python3 libpng-dev libbz2-dev ninja-build
+        llvm-13-dev libomp-13-dev cmake python3 libpng-dev libbz2-dev ninja-build
         sudo update-alternatives --install /usr/bin/clang clang /usr/bin/clang-13 90
         sudo update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-13 90
         sudo update-alternatives --install /usr/bin/clang-format clang-format /usr/bin/clang-format-13 90