Update dependency plotly to v6.6.0

Author: renovate[bot]

requirements.txt

@@ -15,7 +15,7 @@ setuptools==80.9.0 # opentsne uses sklearn.base uses joblib uses distutils missi
 # --- Visualization ---
 wordcloud==1.9.6
 monotonic==1.6
-plotly[kaleido]==6.5.2
+plotly[kaleido]==6.6.0
 seaborn==0.13.2 # To visualize clustering results
 
 # --- Machine Learning / Optimization ---