clusterer: Update AgglomerativeClustering keyword to fix deprecation (#…

…218)

Changes the keyword for the metric used to compute the linkage in sklearn.cluster.AgglomerativeClustering from `affinity`, which is deprecated in scikit-learn 1.2, to `metric`.

Behaviour should be identical.

See https://scikit-learn.org/stable/whats_new/v1.2.html#sklearn-cluster and https://scikit-learn.org/stable/modules/generated/sklearn.cluster.AgglomerativeClustering.html

ema_workbench/analysis/clusterer.py

@@ -100,7 +100,7 @@ def apply_agglomerative_clustering(distances, n_clusters, linkage="average"):
     """
 
     c = cluster.AgglomerativeClustering(
-        n_clusters=n_clusters, affinity="precomputed", linkage=linkage
+        n_clusters=n_clusters, metric="precomputed", linkage=linkage
     )
     clusters = c.fit_predict(distances)
     return clusters