Fix typo in code

Just to have devs attention on this.
It passed the "make check" on Linux.
No idea if it's really a typo.

Change-Id: Ifa73de9fcb2859c89c83873f5090020a83ad3353
Reviewed-on: https://gerrit.libreoffice.org/47263Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>

oox/source/dump/biffdumper.ini

@@ -981,7 +981,7 @@ end
 
 shortlist=CHFRLAYOUT-LEGENDPOS,0,bottom,top-right,top,right,left
 
-shortlist=CHFRLAYOUT-MODE,0,auto,factor,egde
+shortlist=CHFRLAYOUT-MODE,0,auto,factor,edge
 
 # CHFRPLOTAREALAYOUT ---------------------------------------------------------
 
@@ -991,7 +991,7 @@ end
 
 shortlist=CHFRLAYOUT-LEGENDPOS,0,bottom,top-right,top,right,left
 
-shortlist=CHFRLAYOUT-MODE,0,auto,factor,egde
+shortlist=CHFRLAYOUT-MODE,0,auto,factor,edge
 
 # CHFRUNITPROPS --------------------------------------------------------------