Automatically register the %%bqsql magics.

PiperOrigin-RevId: 895502686

Author: colaboratory-team

google/colab/_import_magics.py

@@ -96,5 +96,6 @@ def impl(line, cell, **kwargs):
 
 def _declare_colabx_magics():
   if get_ipython():
+    _declare_cell_magic('bqsql', 'bigframes', _load_extension)
     _declare_cell_magic('bigquery', 'bigquery_magics', _load_extension)
     _declare_cell_magic('spanner_graph', 'spanner_graphs', _load_extension)