Document getexif [ci skip]

Author: radarhere

docs/reference/Image.rst

@@ -179,6 +179,7 @@ This helps to get the bounding box coordinates of the input image:
 .. automethod:: PIL.Image.Image.getcolors
 .. automethod:: PIL.Image.Image.getdata
 .. automethod:: PIL.Image.Image.getextrema
+.. automethod:: PIL.Image.Image.getexif
 .. automethod:: PIL.Image.Image.getpalette
 .. automethod:: PIL.Image.Image.getpixel
 .. automethod:: PIL.Image.Image.histogram