proofread English version texts

Author: jama1017

chapter3.html

@@ -221,7 +221,7 @@ <h3>
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             <p>
-                Sigmoid calculates the probability that something is true.. For example, if you
+                Sigmoid calculates the probability that something is true. For example, if you
                 want to determine if an image is a cat or not, you would use a sigmoid activation
                 function, which transforms the output value into a probability (a number between 0
                 and 1).

chapter4.html

@@ -263,7 +263,7 @@ <h3><strong>Glossary</strong></h3>
                             direction would be the “steepest” way to minimize loss (downhill).
                             <br><br>
                             <strong>Gradient Descent</strong>: An optimizer that uses gradients to
-                            adjust the weights and bias to minimize loss.
+                            adjust the weights and biases to minimize loss.
                             <br><br>
                         </p>
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