Update README.md

Author: bbottema

README.md

@@ -54,7 +54,7 @@ Simple Java Mail is available in Maven Central:
 [v4.1.3](http://search.maven.org/#artifactdetails%7Corg.simplejavamail%7Csimple-java-mail%7C4.1.3%7Cjar) (28-Jan-2017)
 
 - [#61](https://github.com/bbottema/simple-java-mail/issues/61): Feature: Add support for providing your own Properties object
-- [#63](https://github.com/bbottema/simple-java-mail/issues/63): Feature: Spring support (read properties from Spring context)
+- [#63](https://github.com/bbottema/simple-java-mail/issues/63): **Feature: Spring support (read properties from Spring context)**
 - [#58](https://github.com/bbottema/simple-java-mail/issues/58): Bugfix: Add support for non-English attachment and embedded image names
 - [#62](https://github.com/bbottema/simple-java-mail/issues/62): Bugfix: Empty properties loaded from config should be considered null
 
@@ -204,4 +204,4 @@ v1.4 (15-Jan-2011)
 
 vX.X (26-Apr-2009)
 
-  * Initial upload to Google Code.
+  * Initial upload to Google Code.