Update README.md

Co-authored-by: fendor <fendor@users.noreply.github.com>

Author: hasufell

README.md

@@ -266,7 +266,7 @@ except HLS:
 
 #### Stack/Cabal/GHC can not be found
 
-Also make sure GHCup is installed and in `PATH`. If you're not starting VSCode from the terminal, you might need to add `${HOME}/.ghcup/bin` to PATH like so:
+Also make sure GHCup is installed and in `$PATH`. If you're not starting VSCode from the terminal, you might need to add `${HOME}/.ghcup/bin` to PATH like so:
 
 ```json
   "haskell.serverEnvironment": {