docs: update CHANGELOG.md

Author: gnikit

CHANGELOG.md

@@ -75,7 +75,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Fixed
 
 - Fixed regular expression for parsing version of GFortran in linter
-  ([#744](https://github.com/fortran-lang/vscode-fortran-support/issues/744))
+  ([#759](https://github.com/fortran-lang/vscode-fortran-support/issues/759))
 - Fixed bug where diagnostic messages would linger from the previous state
   ([#706](https://github.com/fortran-lang/vscode-fortran-support/issues/706))
 - Fixed activation bug on Windows causing the persistent cache to fail