CompatHelper: add new compat entry for Clustering at version 0.15, (keep existing compat) (#1029)

Co-authored-by: CompatHelper Julia <compathelper_noreply@julialang.org>

Author: github-actions[bot]

Project.toml

@@ -80,6 +80,7 @@ CaesarZMQExt = "ZMQ"
 [compat]
 ApproxManifoldProducts = "0.7, 0.8"
 AprilTags = "0.8, 0.9"
+Clustering = "0.15"
 ColorVectorSpace = "0.9, 0.10"
 Colors = "0.12"
 Combinatorics = "1"