Fix typos

Closes gh-4083

spring-boot-docs/src/main/asciidoc/spring-boot-features.adoc

@@ -1607,7 +1607,7 @@ you can see how to set things up. There is also a
 in the Jersey 1.x sample that the spring-boot maven plugin has been configured to unpack
 some Jersey jars so they can be scanned by the JAX-RS implementation (because the sample
 asks for them to be scanned in its `Filter` registration). You may need to do the same if
-any of your JAX-RS resources are packages as nested jars.
+any of your JAX-RS resources are packaged as nested jars.
 
 
 
@@ -3398,7 +3398,7 @@ property with a different value for each instance of your application.
 
 === Using a Bitronix transaction manager
 Bitronix is another popular open source JTA transaction manager implementation. You can
-use the `spring-boot-starter-jta-bitronix` starter POM to add the appropriate Birtronix
+use the `spring-boot-starter-jta-bitronix` starter POM to add the appropriate Bitronix
 dependencies to your project. As with Atomikos, Spring Boot will automatically configure
 Bitronix and post-process your beans to ensure that startup and shutdown ordering is
 correct.

spring-boot-docs/src/main/asciidoc/using-spring-boot.adoc

@@ -554,7 +554,7 @@ source is a `@Configuration` class. Usually the class that defines the `main` me
 is also a good candidate as the primary `@Configuration`.
 
 TIP: Many Spring configuration examples have been published on the Internet that use XML
-configuration. Always try to use the equivalent Java-base configuration if possible.
+configuration. Always try to use the equivalent Java-based configuration if possible.
 Searching for `+enable*+` annotations can be a good starting point.