Fix Headline and add info of support options for migration

build/README.md

@@ -1,4 +1,4 @@
-#PDE buld is in deep maintenance mode
+# PDE buld is in deep maintenance mode
 
 ## Compatibility with newer Eclipse versions functionality
 Enhancements to make use of new functionality implemented in latest versions of other components are most likely not implemented in pde.build.
@@ -9,3 +9,4 @@ Bugs affecting in IDE Export functionality may still be worked on (until replace
 ## Alternative headless/standalone builds recommendation
 [Tycho project](https://github.com/eclipse-tycho/tycho) is the most common and active project for building Eclipse RCP apps and thus is recommended as a replacement for pde.build.
 
+If you need support in migration see https://github.com/eclipse-tycho/tycho#getting-support for details.