Fix score conversion for inner product

Signed-off-by: John Mazanec <jmazane@amazon.com>

docs/knn/knn-score-script.md

@@ -312,8 +312,8 @@ A space corresponds to the function used to measure the distance between two poi
   </tr>
   <tr>
     <td>innerproduct</td>
-    <td>\[ Distance(X, Y) = \sum_{i=1}^n (X_i - Y_i) \]</td>
-    <td>1 / (1 + Distance Function)</td>
+    <td>\[ Distance(X, Y) = -{A &middot; B} \]</td>
+    <td>if (Distance Function >= 0) 1 / (1 + Distance Function) else -Distance Function + 1</td>
   </tr>
   <tr>
     <td>hammingbit</td>