Add blank line

Co-authored-by: Dongdong Tian <seisman.info@gmail.com>

Author: yvonnefroehlich

pygmt/src/pygmtlogo.py

@@ -268,6 +268,7 @@ def pygmtlogo(  # noqa: PLR0913
 ):
     """
     Plot the PyGMT logo.
+    
     The design of the logo is kindly provided by `@sfrooti <https://github.com/sfrooti>`_
     and consists of a visual and the wordmark "PyGMT".