Fix non-pattern package prefix check in CandidateComponentsIndex

Prior to this commit, the non-pattern package prefix check used
packageName.startsWith(basePackage) which incorrectly treats
"com.example2.foo" as a subpackage of "com.example".

Closes gh-35601

Signed-off-by: NeatGuyCoding <15627489+NeatGuyCoding@users.noreply.github.com>

spring-context/src/main/java/org/springframework/context/index/CandidateComponentsIndex.java

@@ -150,7 +150,7 @@ public class CandidateComponentsIndex {
 			return pathMatcher.match(basePackage, packageName);
 		}
 		else {
-			return packageName.startsWith(basePackage);
+			return packageName.equals(basePackage) || packageName.startsWith(basePackage + ".");
 		}
 	}