Add missing package that caused verilator build to fail

Signed-off-by: Maciej Dudek <mdudek@antmicro.com>

.github/workflows/ci.yml

@@ -43,10 +43,10 @@ jobs:
       # Build / Install Verilator
       - name: Build Verilator
         run: |
+          sudo apt-get install help2man
           export PATH="/usr/lib/ccache:/usr/local/opt/ccache/libexec:$PATH"
           git clone https://github.com/verilator/verilator
           cd verilator
-          git checkout be65030d6145e4553500b91b3db36db0993aa8af
           autoconf
           ./configure
           make -j$(nproc)