drm/plane: Fix comment typo

Minor typofix noticed when reading the KMS documentation.
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Signed-off-by: Simon Ser <contact@emersion.fr>
Reviewed-by: Simon Ser <contact@emersion.fr>
Link: https://patchwork.freedesktop.org/patch/msgid/20210829160401.4588-1-alyssa@rosenzweig.io

include/drm/drm_plane.h

@@ -43,7 +43,7 @@ enum drm_scaling_filter {
 /**
  * struct drm_plane_state - mutable plane state
  *
- * Please not that the destination coordinates @crtc_x, @crtc_y, @crtc_h and
+ * Please note that the destination coordinates @crtc_x, @crtc_y, @crtc_h and
  * @crtc_w and the source coordinates @src_x, @src_y, @src_h and @src_w are the
  * raw coordinates provided by userspace. Drivers should use
  * drm_atomic_helper_check_plane_state() and only use the derived rectangles in