Add libstdc++-static to Fedora build dependencies (#2113)

Summary:
Pull Request resolved: #2113

The libstdc++-static package is required for building Monarch on Fedora systems. Without this package, the build fails during linking. This adds it to the installation instructions for Fedora distributions.

Reviewed By: samlurye

Differential Revision: D88899581

fbshipit-source-id: f548f0518001976b5dc2518d316187ce347db352

Author: zdevito

README.md

@@ -92,8 +92,8 @@ conda install libunwind -y
 # Install the correct cuda and cuda-toolkit versions for your machine
 sudo dnf install cuda-toolkit-12-8 cuda-12-8
 
-# Install clang-dev and nccl-dev
-sudo dnf install clang-devel libnccl-devel
+# Install clang-devel, nccl-devel, and libstdc++-static
+sudo dnf install clang-devel libnccl-devel libstdc++-static
 # Or, in some environments, the following may be necessary instead
 conda install -c conda-forge clangdev nccl
 conda update -n monarchenv --all -c conda-forge -y