docs(fortls): update linke of fortls (#3258)

lua/lspconfig/server_configurations/fortls.lua

@@ -17,7 +17,7 @@ return {
   },
   docs = {
     description = [[
-https://github.com/gnikit/fortls
+https://fortls.fortran-lang.org/index.html
 
 fortls is a Fortran Language Server, the server can be installed via pip
 
@@ -27,7 +27,7 @@ pip install fortls
 
 Settings to the server can be passed either through the `cmd` option or through
 a local configuration file e.g. `.fortls`. For more information
-see the `fortls` [documentation](https://gnikit.github.io/fortls/options.html).
+see the `fortls` [documentation](https://fortls.fortran-lang.org/options.html).
     ]],
     default_config = {
       root_dir = [[root_pattern(".fortls")]],