Polish "Remove english contractions from the documentation"

See gh-28064

Author: snicoll

spring-boot-project/spring-boot-docs/src/docs/asciidoc/features/developing-auto-configuration.adoc

@@ -209,7 +209,7 @@ include::{docs-java}/features/developingautoconfiguration/testing/MyServiceAutoC
 
 [[features.developing-auto-configuration.custom-starter]]
 === Creating Your Own Starter
-A typical Spring Boot starter contains code to auto-configure and customize the infrastructure of a given technology, let us call that "acme".
+A typical Spring Boot starter contains code to auto-configure and customize the infrastructure of a given technology, let's call that "acme".
 To make it easily extensible, a number of configuration keys in a dedicated namespace can be exposed to the environment.
 Finally, a single "starter" dependency is provided to help users get started as easily as possible.