[TF32] Fix typo in tf32 wrapper function (pytorch#78438)

Pull Request resolved: pytorch#78438
Approved by: https://github.com/ngimel

Author: eqy

torch/testing/_internal/common_cuda.py

@@ -76,15 +76,15 @@ def tf32_off():
 @contextlib.contextmanager
 def tf32_on(self, tf32_precision=1e-5):
     old_allow_tf32_matmul = torch.backends.cuda.matmul.allow_tf32
-    old_precison = self.precision
+    old_precision = self.precision
     try:
         torch.backends.cuda.matmul.allow_tf32 = True
         self.precision = tf32_precision
         with torch.backends.cudnn.flags(enabled=None, benchmark=None, deterministic=None, allow_tf32=True):
             yield
     finally:
         torch.backends.cuda.matmul.allow_tf32 = old_allow_tf32_matmul
-        self.precision = old_precison
+        self.precision = old_precision
 
 
 # This is a wrapper that wraps a test to run this test twice, one with