Figure.logo: Fix typos in docstrings (#4306)

Author: seisman

pygmt/src/logo.py

@@ -66,12 +66,12 @@ def logo(  # noqa: PLR0913
 
         - A :class:`pygmt.params.Position` object to fully control the reference point,
           anchor point, and offset.
-        - A sequence of two values representing the x and y coordinates in plot
+        - A sequence of two values representing the x- and y- coordinates in plot
           coordinates, e.g., ``(1, 2)`` or ``("1c", "2c")``.
         - A :doc:`2-character justification code </techref/justification_codes>` for a
           position inside the plot, e.g., ``"TL"`` for Top Left corner inside the plot.
 
-        If not specified, defaults to the lower-left corner of the plot (position
+        If not specified, defaults to the Bottom Left corner of the plot (position
         ``(0, 0)`` with anchor ``"BL"``).
     width
     height