Polish README

See gh-26320

Author: agg505

README.adoc

@@ -46,14 +46,14 @@ Here is a quick teaser of a complete Spring Boot application in Java:
 
 
 
-== Getting help
+== Getting Help
 Are you having trouble with Spring Boot? We want to help!
 
 * Check the {docs}/html/[reference documentation], especially the {docs}/html/howto.html#howto[How-to's] -- they provide solutions to the most common questions.
 * Learn the Spring basics -- Spring Boot builds on many other Spring projects; check the https://spring.io[spring.io] web-site for a wealth of reference documentation.
   If you are new to Spring, try one of the https://spring.io/guides[guides].
 * If you are upgrading, read the {github}/wiki[release notes] for upgrade instructions and "new and noteworthy" features.
-* Ask a question - we monitor https://stackoverflow.com[stackoverflow.com] for questions tagged with https://stackoverflow.com/tags/spring-boot[`spring-boot`].
+* Ask a question -- we monitor https://stackoverflow.com[stackoverflow.com] for questions tagged with https://stackoverflow.com/tags/spring-boot[`spring-boot`].
   You can also chat with the community on https://gitter.im/spring-projects/spring-boot[Gitter].
 * Report bugs with Spring Boot at {github}/issues[github.com/spring-projects/spring-boot/issues].