Update spring-pulsar-docs.gradle

Pin node.js version to 24.15.0. 

See this commit for more details: spring-projects/spring-security@85514a9

All our current docs deploy actions are failing due to this. 

Signed-off-by: Soby Chacko <soby.chacko@broadcom.com>

Author: sobychacko

spring-pulsar-docs/spring-pulsar-docs.gradle

@@ -8,6 +8,10 @@ plugins {
 
 apply from: "${rootDir}/gradle/antora-docs.gradle"
 
+node {
+	version = "24.15.0"
+}
+
 description = 'Spring for Apache Pulsar Docs'
 
 configurations {