Docs CTR: Correct version

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc5.5.x/trunk@1394462 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/build/BUILDING.txt b/build/BUILDING.txt
index a30e4e4..c03f374 100644
--- a/build/BUILDING.txt
+++ b/build/BUILDING.txt
@@ -75,7 +75,7 @@
   available, which will be used to actually perform the build.
 
 
-(2) Checkout or obtain the source code for Tomcat 6.0
+(2) Checkout or obtain the source code for Tomcat 5.5
 
 * Tomcat 5.5 SVN repository URL:
   http://svn.apache.org/repos/asf/tomcat/tc5.5.x/trunk/