Exclude build output directories from nohttp source set

The checkstyleNohttp task scans the entire project tree for non-HTTPS
URLs. Without excluding **/build/**, subproject build output directories
generated during the first build become additional source inputs for
subsequent builds, changing the cache key and causing cache misses.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Signed-off-by: Gasper Kojek <gkojek@gradle.com>

Author: 2 people

build.gradle

@@ -80,7 +80,7 @@ develocity {
 }
 
 nohttp {
-	source.exclude "buildSrc/build/**", "javascript/.gradle/**", "javascript/package-lock.json", "javascript/node_modules/**", "javascript/build/**", "javascript/dist/**"
+	source.exclude "buildSrc/build/**", "**/build/**", "javascript/.gradle/**", "javascript/package-lock.json", "javascript/node_modules/**", "javascript/build/**", "javascript/dist/**"
 	source.builtBy(project(':spring-security-config').tasks.withType(RncToXsd))
 }