Standardize name casing in documentation

Author: MariusVolkhart

src/main/docs/guide/extensionFunctions.adoc

@@ -1,5 +1,5 @@
 The `micronaut-kotlin-extension-functions` dependency adds a variety of convenience functions to make using
-micronaut with kotlin more user-friendly. For example, https://kotlinlang.org/docs/reference/inline-functions.html#reified-type-parameters[reified type parameters]
+Micronaut with Kotlin more user-friendly. For example, https://kotlinlang.org/docs/reference/inline-functions.html#reified-type-parameters[reified type parameters]
 help alleviate the need for using `::class.java` in many places where it would otherwise be required.
 
 dependency:io.micronaut.kotlin:micronaut-kotlin-extension-functions[]