DOC: Update link from VirtusLab to pandas-dev repo (pandas-dev#47869)

* DOC: Update link from VirtusLab to pandas-dev repo

* DOC: Extend underline

Author: james-d-f

doc/source/ecosystem.rst

@@ -591,12 +591,12 @@ Library            Accessor     Classes                              Description
 Development tools
 -----------------
 
-`pandas-stubs <https://github.com/VirtusLab/pandas-stubs>`__
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+`pandas-stubs <https://github.com/pandas-dev/pandas-stubs>`__
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 While pandas repository is partially typed, the package itself doesn't expose this information for external use.
 Install pandas-stubs to enable basic type coverage of pandas API.
 
 Learn more by reading through :issue:`14468`, :issue:`26766`, :issue:`28142`.
 
-See installation and usage instructions on the `github page <https://github.com/VirtusLab/pandas-stubs>`__.
+See installation and usage instructions on the `github page <https://github.com/pandas-dev/pandas-stubs>`__.