[gimp-help] Small typo fixed

[Marco Ciampa <marcoc src gnome org>]

commit f0cbbd3201bdf37c67d43c1ce6b54aa8eddd8935
Author: Marco Ciampa <ciampix posteo net>
Date:   Fri Apr 3 17:50:56 2020 +0200

    Small typo fixed

 src/menus/image/canvas-size.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/menus/image/canvas-size.xml b/src/menus/image/canvas-size.xml
index 71d44c43c..c1a7302e0 100644
--- a/src/menus/image/canvas-size.xml
+++ b/src/menus/image/canvas-size.xml
@@ -148,7 +148,7 @@
           <itemizedlist>
             <listitem>
               <para>
-                <guilabel>Resize layer</guilabel>: this drop-down list
+                <guilabel>Resize layers</guilabel>: this drop-down list
                 offers you several possibilities:
                 <figure>
                   <title>The Resize layers list</title>