[gimp-book-painting] Revision width last figure on download topic

[Americo Gobbo <amerigo src gnome org>]

commit 19d5efb4dcbf76fb08cdf1b6d3c1fd6dc88267b8
Author: Americo Gobbo <jag rabisco gmail com>
Date:   Fri Jul 13 10:46:18 2018 -0300

    Revision width last figure on download topic

 parametric-brushes.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/parametric-brushes.md b/parametric-brushes.md
index d8e3378..c188a48 100644
--- a/parametric-brushes.md
+++ b/parametric-brushes.md
@@ -44,7 +44,7 @@ I have verified, also, that is possible to use different tools, pencil, paintbru
 In general, all size brushes are working well, but mainly between 8 ~ 64 pixels it seems the better 
compromise. The large brushes are interesting for covering large areas and is not possible to have a good 
shape, they are appearing a bit soft.
 
 ## Parametric Basic Brush Set and Paint Dynamics | Download
-<figure><img src="parametric-brushes.assets/parametric-brushes-shapes-and-strokes-dry-media.png" width="" 
title="Parametric brush with Dry Media Paint Dynamics with Airbrush Tool" /><br><figcaption>Samples using 
round parametric brushes with different shapes with Airbrush tool. Tool.</figcaption></figure>
+<figure><img src="parametric-brushes.assets/parametric-brushes-shapes-and-strokes-dry-media.png" width="640" 
title="Parametric brush with Dry Media Paint Dynamics with Airbrush Tool" /><br><figcaption>Samples using 
round parametric brushes with different shapes with Airbrush tool. Tool.</figcaption></figure>
 
 The brush set, in 'B0' folder, contains the .vbr basic brushes, round and block (hard and soft versions). 
The paint dynamics are two: for the graphics tablet's stylus with tilt and not. The version with tilt is fun 
to use and is possible to emulate well the effect when you are inclining the tool in the real cases.