Apply suggestions from code review

Co-authored-by: HammadTheOne <[email protected]>

Author: smallstepman

doc/python/bio-alignment-chart.md

@@ -36,8 +36,9 @@ jupyter:
 
 ```python
 import plotly.express as px
+import pandas as pd
 
-df = (pd.read_csv('https://raw.githubusercontent.com/plotly/dash-bio-docs-files/master/gene_conservation.csv')
+df = (pd.read_csv('https://raw.githubusercontent.com/plotly/datasets/master/Dash_Bio/Genetic/gene_conservation.csv')
         .set_index('0')
         .loc[['consensus','conservation']]
         .T)