Update pygmt/src/directional_rose.py [skip ci]

Co-authored-by: Michael Grund <23025878+michaelgrund@users.noreply.github.com>

Author: seisman

pygmt/src/directional_rose.py

@@ -38,8 +38,8 @@ def directional_rose(
         width [Default is 10 %].
     label
         A sequence of four strings to label the cardinal points W,E,S,N. Use an empty
-        string to skip a specific label. If set to ``True``, use the default labels
-        ``["W", "E", "S", "N"]``.
+        string to skip a specific label. If set to ``True``, the default labels
+        ``["W", "E", "S", "N"]`` are used.
     fancy
         Get a fancy rose. The fanciness level can be set to 1, 2, or 3: