Support cuda 11.5: install magma for cuda in conda (#68665)

Summary:
Fixes https://github.com/pytorch/pytorch/issues/68667

Pull Request resolved: https://github.com/pytorch/pytorch/pull/68665

Reviewed By: malfet

Differential Revision: D32570283

Pulled By: atalman

fbshipit-source-id: 4471fe8c4f8cc74c542ed67038322f07e861af73
diff --git a/.circleci/docker/common/install_conda.sh b/.circleci/docker/common/install_conda.sh
index f79b415..b34b4b2 100755
--- a/.circleci/docker/common/install_conda.sh
+++ b/.circleci/docker/common/install_conda.sh
@@ -94,6 +94,8 @@
     conda_install magma-cuda111 -c pytorch
   elif [[ "$CUDA_VERSION" == 11.3* ]]; then
     conda_install magma-cuda113 -c pytorch
+  elif [[ "$CUDA_VERSION" == 11.5* ]]; then
+    conda_install magma-cuda115 -c pytorch
   fi
 
   # TODO: This isn't working atm