Add documentation link to cabal file.

quickcheck-quid.cabal

@@ -1,15 +1,20 @@
 cabal-version:  3.0
 name:           quickcheck-quid
 version:        0.0.1
-synopsis:       Quasi-unique identifiers for QuickCheck
-description:    Quasi-unique identifiers for QuickCheck.
 bug-reports:    https://github.com/jonathanknowles/quickcheck-quid/issues
 license:        Apache-2.0
 license-file:   LICENSE
 author:         Jonathan Knowles
 maintainer:     [email protected]
 copyright:      2022 Jonathan Knowles
 category:       Testing
+synopsis:       Quasi-unique identifiers for QuickCheck
+description:
+    Quasi-unique identifiers for QuickCheck.
+
+    For the most up-to-date documentation, please view the following page:
+
+    https://github.com/jonathanknowles/quickcheck-quid/blob/main/README.md
 
 extra-source-files:
     README.md