fixup! rename the file too

Author: ulysses4ever

doc/how-to-analyze-haskell-code-performance.rst renamed to doc/how-to-enable-profiling.rst

@@ -15,7 +15,7 @@ Welcome to the Cabal User Guide
 
    how-to-package-haskell-code
    how-to-source-packages
-   how-to-analyze-haskell-code-performance
+   how-to-enable-profiling
    how-to-build-like-nix
    how-to-run-in-windows
    how-to-use-backpack