Insert generated cell in Analyze in Notebook at index 0, rather than replacing first cell's contents. (#6965)

extensions/notebook/src/extension.ts

@@ -234,12 +234,11 @@ async function analyzeNotebook(oeContext?: azdata.ObjectExplorerContext): Promis
 				+ os.EOL + '.option("header", "true")' + os.EOL + '.csv("{0}"))' + os.EOL + 'df.show(10)';
 
 			editor.edit(editBuilder => {
-				editBuilder.replace(0, {
+				editBuilder.insertCell({
 					cell_type: 'code',
 					source: analyzeCommand.replace('{0}', hdfsPath)
-				});
+				}, 0);
 			});
-
 		}
 	}
 }