The "SerenityOS DSL Syntax Highlight" extension has been de-listed
from both the VS Code Marketplace and Open VSX. Remove the broken
section from the documentation to prevent confusion.
The reason for this change is that CMake/vcpkg are unable to detect a
change to VCPKG_LIBRARY_LINKAGE. So when we switch to dynamic builds,
the switch would be non-functional, and every developer would have to
remove their Build and vcpkg cache directories manually. By changing
these directories, vcpkg is able to detect it must rebuild.
