Bump com.gradle.enterprise from 3.15 to 3.15.1 in /test/init-scripts

Bumps com.gradle.enterprise from 3.15 to 3.15.1.

---
updated-dependencies:
- dependency-name: com.gradle.enterprise
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

test/init-scripts/settings.gradle

@@ -1,5 +1,5 @@
 plugins {
-    id "com.gradle.enterprise" version "3.15"
+    id "com.gradle.enterprise" version "3.15.1"
     id "com.gradle.common-custom-user-data-gradle-plugin" version "1.11.2"
 }