Update install.txt with new repo url

gregsadetsky · web-flow · commit df625a61ca57 · 2023-01-06T21:27:17.000-05:00
diff --git a/messages/install.txt b/messages/install.txt
@@ -7,4 +7,4 @@ This linter plugin for SublimeLinter provides an interface to mypy.
 Before this plugin will activate, you *must*
 follow the installation instructions here:
 
-https://github.com/fredcallaway/SublimeLinter-contrib-mypy
+https://github.com/SublimeLinter/SublimeLinter-mypy
