Fix dimensions of 1st Linear layer to match new expected size

Author: kiersten-stokes

beginner_source/introyt/introyt1_tutorial.py

@@ -181,7 +181,7 @@ def __init__(self):
         self.conv1 = nn.Conv2d(1, 6, 5)
         self.conv2 = nn.Conv2d(6, 16, 5)
         # an affine operation: y = Wx + b
-        self.fc1 = nn.Linear(16 * 6 * 6, 120)  # 6*6 from image dimension
+        self.fc1 = nn.Linear(16 * 5 * 5, 120)  # 5*5 from image dimension
         self.fc2 = nn.Linear(120, 84)
         self.fc3 = nn.Linear(84, 10)