RELEASING: Fix documentation of proper ChangeLog path

The releases page includes more than just cairo, so need to be explicit
in naming our uploaded Changelog file.

RELEASING

@@ -99,7 +99,7 @@ Here are the steps to follow to create a new cairo release:
 	Include a link to the incremental ChangeLog for this release,
 	which we'll be uploading in a later step:
 
-		http://cairographics.org/releases/ChangeLog.${THIS_RELEASE}
+		http://cairographics.org/releases/ChangeLog.cairo-${THIS_RELEASE}
 
 4) Increment cairo_version_{minor|micro} in cairo-version.h:
 
@@ -149,7 +149,7 @@ Here are the steps to follow to create a new cairo release:
 
 	Upload the incremental ChangeLog generated by the above:
 
-		scp ChangeLog.cache-X.Y.Z-1.. \
+		scp ChangeLog.cache-${LAST_RELEASE}.. \
 		    cairographics.org:/srv/cairo.freedesktop.org/www/releases/ChangeLog.cairo-${THIS_RELEASE}
 
 	To undo a release-publish, before you've sent any emails or