Fix building of rpm on github action.

* Do not require to install gcc-c++, because it is only C
  project
* Mark "checkout" directory as trusted to be able to use it
  by tito
* Updated version og action/checkout to v4

.github/workflows/build.yml

@@ -43,11 +43,17 @@ jobs:
     steps:
       # Install git and other tools first to be able to use 'actions/checkout@v2' properly
       - name: Install required packages
-        run: dnf install --nogpgcheck -y tito gcc gcc-c++ make cmake git-core
+        run: dnf install --nogpgcheck -y tito gcc make cmake git-core
 
       # Clone repository and set everything for building of RPMs
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
+
+      # This step is required so Tito can properly read git history
+      # See https://github.com/actions/checkout/issues/766
+      - name: Trust git repository path
+        run: |
+          git config --global --add safe.directory '*'
 
       - name: Create build directory
         run: rm -rf ./rpm_build; mkdir ./rpm_build