Fix javadoc warnings for spring-security-oauth2-client

- Fix a javadoc warning
- Apply javadoc-warnings-error plugin

Closes gh-18460

Signed-off-by: Bae Jihong <dasog@naver.com>

Author: Bae Jihong

oauth2/oauth2-client/spring-security-oauth2-client.gradle

@@ -1,3 +1,7 @@
+plugins {
+	id 'javadoc-warnings-error'
+}
+
 apply plugin: 'io.spring.convention.spring-module'
 
 dependencies {

oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/registration/ClientRegistrations.java

@@ -101,7 +101,7 @@ private ClientRegistrations() {
 	 *     .clientSecret("client-secret")
 	 *     .build();
 	 * </pre>
-	 * @param the OpenID Provider configuration map
+	 * @param configuration the OpenID Provider configuration map
 	 * @return the {@link ClientRegistration} built from the configuration
 	 */
 	public static ClientRegistration.Builder fromOidcConfiguration(Map<String, Object> configuration) {