Update comment in Distribution/Client/Version.hs

@emilypi fixed a stale comment

Co-authored-by: Emily Pillmore <[email protected]>

Author: andreasabel

cabal-install/src/Distribution/Client/Version.hs

@@ -6,7 +6,11 @@ module Distribution.Client.Version
 
 import Distribution.Version
 
--- TODO: write a test around this. Don't abuse Paths_cabal_install.
+-- This value determines the `cabal-install --version` output.
+-- 
+-- It is used in several places throughout the project, including anonymous build reports, client configuration, 
+-- and project planning output. Historically, this was a @Paths_*@ module, however, this conflicted with 
+-- program coverage information generated by HPC, and hence was moved to be a standalone value.  
 --
 cabalInstallVersion :: Version
 cabalInstallVersion = mkVersion [3,7]