Docs: Clarify default prefix/suffix of registry.jsp()

[Dongnyoung]

Hello,

The current Spring MVC documentation for View Resolvers shows the following example:

@Override
public void configureViewResolvers(ViewResolverRegistry registry) {
    registry.enableContentNegotiation(new MappingJackson2JsonView());
    registry.jsp();
}

However, the documentation does not explain what defaults are applied by registry.jsp().

Problem

• Readers may assume they must always configure a prefix and suffix manually.

• In reality, registry.jsp() registers an InternalResourceViewResolver with sensible defaults.

• The absence of this detail can cause confusion when JSP views are not found.

Suggested Improvement

Add a short [NOTE] block right after the JSP example clarifying:

• Default prefix: /WEB-INF/

• Default suffix: .jsp

• These defaults are applied automatically, and explicit configuration is only needed if you use a different location or extension.

Benefits

• Prevents confusion about JSP view resolution.

• Makes the framework’s default behavior explicit.

• Helps users quickly diagnose view resolution issues without unnecessary configuration.

I’d appreciate your thoughts on this suggestion!

[sdeleuze]

Superseded by #35430.

[sdeleuze]

@Dongnyoung Next time please juste create the PR, no need to create an issue if you have a PR.