Resolve artifacts from Maven Central first

- Use spring-build-conventions:0.0.36
- Add https://repo.spring.io/release to reference

Closes gh-9367

Author: eleftherias

build.gradle

@@ -1,6 +1,6 @@
 buildscript {
 	dependencies {
-		classpath 'io.spring.gradle:spring-build-conventions:0.0.35.RELEASE'
+		classpath 'io.spring.gradle:spring-build-conventions:0.0.36'
 		classpath "org.springframework.boot:spring-boot-gradle-plugin:$springBootVersion"
 		classpath 'io.spring.nohttp:nohttp-gradle:0.0.5.RELEASE'
 		classpath "io.freefair.gradle:aspectj-plugin:4.1.6"

docs/manual/spring-security-docs-manual.gradle

@@ -43,3 +43,7 @@ def resolvedVersions(Configuration configuration) {
 			.collectEntries { [(it.name + "-version"): it.moduleVersion.id.version] }
 	}
 }
+
+repositories {
+	maven { url "https://repo.spring.io/release" }
+}