Update to Spring Boot 3.1.4

Closes gh-1404

docs/src/docs/asciidoc/examples/spring-authorization-server-docs-examples.gradle

@@ -12,7 +12,7 @@ repositories {
 }
 
 dependencies {
-	implementation(platform("org.springframework.boot:spring-boot-dependencies:3.1.0")) {
+	implementation(platform("org.springframework.boot:spring-boot-dependencies:3.1.4")) {
 		exclude group: "org.springframework.security", module: "spring-security-oauth2-authorization-server"
 	}
 	implementation platform("org.springframework.security:spring-security-bom:6.1.0")

samples/default-authorizationserver/samples-default-authorizationserver.gradle

@@ -1,5 +1,5 @@
 plugins {
-	id "org.springframework.boot" version "3.1.0"
+	id "org.springframework.boot" version "3.1.4"
 	id "io.spring.dependency-management" version "1.1.0"
 	id "java"
 }

samples/demo-authorizationserver/samples-demo-authorizationserver.gradle

@@ -1,5 +1,5 @@
 plugins {
-	id "org.springframework.boot" version "3.1.0"
+	id "org.springframework.boot" version "3.1.4"
 	id "io.spring.dependency-management" version "1.1.0"
 	id "java"
 }

samples/demo-client/samples-demo-client.gradle

@@ -1,5 +1,5 @@
 plugins {
-	id "org.springframework.boot" version "3.1.0"
+	id "org.springframework.boot" version "3.1.4"
 	id "io.spring.dependency-management" version "1.1.0"
 	id "java"
 }

samples/messages-resource/samples-messages-resource.gradle

@@ -1,5 +1,5 @@
 plugins {
-	id "org.springframework.boot" version "3.1.0"
+	id "org.springframework.boot" version "3.1.4"
 	id "io.spring.dependency-management" version "1.1.0"
 	id "java"
 }