Fix grammar

spring-core/src/main/java/org/springframework/core/io/support/PropertySourceProcessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -40,7 +40,7 @@ import org.springframework.util.ReflectionUtils;
 /**
  * Contribute {@link PropertySource property sources} to the {@link Environment}.
  *
- * <p>This class is stateful and merge descriptors with the same name in a
+ * <p>This class is stateful and merges descriptors with the same name in a
  * single {@link PropertySource} rather than creating dedicated ones.
  *
  * @author Stephane Nicoll