Add link to bash-env-fish

Author: Simon Guest

README.md

@@ -4,7 +4,7 @@ This is a Bash script `bash-env-json` for export of Bash environment as JSON, su
 
 Everyone needs Bash format environment support.  Being able to export this as JSON makes it readily available for import into any modern shell.
 
-Adapters for [Elvish](https://github.com/tesujimath/bash-env-elvish) and [Nushell](https://github.com/tesujimath/nu_plugin_bash_env) are provided for ease of use from those shells.
+Adapters for [Elvish](https://github.com/tesujimath/bash-env-elvish), [Nushell](https://github.com/tesujimath/bash-env-nushell), and [Fish](https://github.com/tesujimath/bash-env-fish) are provided for ease of use from those shells.
 
 Source files may be arbitrarily complex Bash, including conditionals, etc.