Fix build following Spring Security changes

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/oauth2/resource/servlet/OAuth2ResourceServerJwtConfiguration.java

@@ -28,6 +28,7 @@ import org.springframework.boot.autoconfigure.security.oauth2.resource.OAuth2Res
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Conditional;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.security.oauth2.jose.jws.SignatureAlgorithm;
 import org.springframework.security.oauth2.jwt.JwtDecoder;
 import org.springframework.security.oauth2.jwt.JwtDecoders;
 import org.springframework.security.oauth2.jwt.NimbusJwtDecoder;
@@ -53,7 +54,8 @@ class OAuth2ResourceServerJwtConfiguration {
 	@ConditionalOnMissingBean
 	public JwtDecoder jwtDecoderByJwkKeySetUri() {
 		return NimbusJwtDecoder.withJwkSetUri(this.properties.getJwkSetUri())
-				.jwsAlgorithm(this.properties.getJwsAlgorithm()).build();
+				.jwsAlgorithm(SignatureAlgorithm.from(this.properties.getJwsAlgorithm()))
+				.build();
 	}
 
 	@Bean

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/oauth2/resource/servlet/OAuth2ResourceServerAutoConfigurationTests.java

@@ -102,7 +102,7 @@ public class OAuth2ResourceServerAutoConfigurationTests {
 	public void autoConfigurationShouldConfigureResourceServerWithJwsAlgorithm() {
 		this.contextRunner.withPropertyValues(
 				"spring.security.oauth2.resourceserver.jwt.jwk-set-uri=https://jwk-set-uri.com",
-				"spring.security.oauth2.resourceserver.jwt.jws-algorithm=HS512")
+				"spring.security.oauth2.resourceserver.jwt.jws-algorithm=RS384")
 				.run((context) -> {
 					JwtDecoder jwtDecoder = context.getBean(JwtDecoder.class);
 					Object processor = ReflectionTestUtils.getField(jwtDecoder,
@@ -110,7 +110,7 @@ public class OAuth2ResourceServerAutoConfigurationTests {
 					Object keySelector = ReflectionTestUtils.getField(processor,
 							"jwsKeySelector");
 					assertThat(keySelector).hasFieldOrPropertyWithValue("jwsAlg",
-							JWSAlgorithm.HS512);
+							JWSAlgorithm.RS384);
 					assertThat(getBearerTokenFilter(context)).isNotNull();
 				});
 	}