Bump com.gradle.enterprise from 3.14.1 to 3.15 (#3602)

Bumps com.gradle.enterprise from 3.14.1 to 3.15.

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

settings.gradle

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 plugins {
-	id "com.gradle.enterprise" version "3.14.1"
+	id "com.gradle.enterprise" version "3.15"
 }
 
 rootProject.name = 'reactor'