Upgrade to OAuth2 OIDC SDK 8.19.1

Closes gh-22951

Author: snicoll

spring-boot-project/spring-boot-dependencies/build.gradle

@@ -1198,7 +1198,7 @@ bom {
 			]
 		}
 	}
-	library("OAuth2 OIDC SDK", "7.5") {
+	library("OAuth2 OIDC SDK", "8.19.1") {
 		group("com.nimbusds") {
 			modules = [
 				"oauth2-oidc-sdk"