Fix typo

python -> Python

Author: changeworld

articles/synapse-analytics/data-explorer/kusto-query-language/toc.yml

@@ -134,7 +134,7 @@ items:
       href: /azure/data-explorer/kusto/query/pivotplugin?context=/azure/synapse-analytics/context/context
     - name: preview plugin
       href: /azure/data-explorer/kusto/query/previewplugin?context=/azure/synapse-analytics/context/context
-    - name: python plugin
+    - name: Python plugin
       href: /azure/data-explorer/kusto/query/pythonplugin?context=/azure/synapse-analytics/context/context
     - name: R plugin
       href: /azure/data-explorer/kusto/query/rplugin?context=/azure/synapse-analytics/context/context