Fix import error when running doctests for RL examples (#12010)

awaelchli · carmocca · justusschock · commit 6e3168dc696a · 2022-02-21T10:55:27.000+01:00
Co-authored-by: Carlos Mocholí &lt;carlossmocholi@gmail.com&gt;
diff --git a/requirements/examples.txt b/requirements/examples.txt
@@ -1,3 +1,3 @@
 torchvision>=0.8.*
-gym>=0.17.0
+gym[classic_control]>=0.17.0
 ipython[all]
