Fix Javadoc

This commit fixes various Javadoc issues across the code base.

See gh-32403

spring-expression/src/main/java/org/springframework/expression/spel/ast/FunctionReference.java

@@ -163,8 +163,8 @@ public class FunctionReference extends SpelNodeImpl {
 	/**
 	 * Execute a function represented as {@link MethodHandle}.
 	 * <p>Method types that take no arguments (fully bound handles or static methods
-	 * with no parameters) can use {@link MethodHandle#invoke()} which is the most
-	 * efficient. Otherwise, {@link MethodHandle#invokeWithArguments()} is used.
+	 * with no parameters) can use {@link MethodHandle#invoke(Object... var1)} which is the most
+	 * efficient. Otherwise, {@link MethodHandle#invokeWithArguments(Object... arguments)} is used.
 	 * @param state the expression evaluation state
 	 * @param methodHandle the method handle to invoke
 	 * @return the return value of the invoked Java method

spring-expression/src/test/java/org/springframework/expression/spel/ScenariosForSpringSecurityExpressionTests.java

@@ -39,7 +39,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 
 ///CLOVER:OFF
 /**
- * Spring Security scenarios from https://docs.spring.io/spring-security/reference/servlet/authorization/expression-based.html
+ * Spring Security scenarios from <a href="https://docs.spring.io/spring-security/reference/servlet/authorization/authorize-http-requests.html#authorization-expressions">Expressing Authorization with SpEL</a>
  *
  * @author Andy Clement
  */