External Config Doc Update

This patch makes a small change to the documentation for External Configuration regarding how @value behaves with camelCase variables and environment variables.

Author: linkian209

documentation/spring-boot-docs/src/docs/antora/modules/reference/pages/features/external-config.adoc

@@ -1380,7 +1380,7 @@ If you do want to use javadoc:org.springframework.beans.factory.annotation.Value
 This will allow Spring Boot to use the same logic as it does when xref:features/external-config.adoc#features.external-config.typesafe-configuration-properties.relaxed-binding[relaxed binding] javadoc:org.springframework.boot.context.properties.ConfigurationProperties[format=annotation].
 
 For example, `@Value("${demo.item-price}")` will pick up `demo.item-price` and `demo.itemPrice` forms from the `application.properties` file, as well as `DEMO_ITEMPRICE` from the system environment.
-If you used `@Value("${demo.itemPrice}")` instead, `demo.item-price` and `DEMO_ITEMPRICE` would not be considered.
+If you used `@Value("${demo.itemPrice}")` instead, `demo.item-price` would not be considered; however, `DEMO_ITEMPRICE` from the environment would still be considered.
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 If you define a set of configuration keys for your own components, we recommend you group them in a POJO annotated with javadoc:org.springframework.boot.context.properties.ConfigurationProperties[format=annotation].