Document InputObject behavior in CAS action functions (#1110)

## Changes

- Document how the InputObject passed to a ContextActionService action
function won't correspond to a bound input when the function is called
with Cancel state.
- Since every entry in the table of function parameters would have an
extra detail/note about it, it seemed unnecessary to keep those notes
outside of the table, so they have been put in to the table.

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---------

Co-authored-by: IgnisRBX <[email protected]>

Author: EmeraldSlash

content/en-us/reference/engine/classes/ContextActionService.yaml

@@ -149,25 +149,26 @@ methods:
       <tr>
         <td>1</td>
         <td><code>string</code></td>
-        <td>The same string that was originally passed to BindAction†</td>
+        <td>The same string that was originally passed to <code>Class.ContextActionService:BindAction()|BindAction()</code>.
+        This allows one function to handle multiple actions at once, if necessary.</td>
       </tr>
       <tr>
         <td>2</td>
         <td><code>Enum.UserInputState</code></td>
-        <td>The state of the input (Begin, Change, End or Cancel)*</td>
+        <td>The state of the input. <code>Enum.UserInputState|Cancel</code> is sent
+        if some input was in progress and another action bound over that in-progress
+        input, or if the in-progress bound action was unbound through <code>Class.ContextActionService:UnbindAction()|UnbindAction()</code>.</td>
       </tr>
       <tr>
         <td>3</td>
         <td><code>InputObject</code></td>
-        <td>An object that contains information about the input (varies based on UserInputType)</td>
+        <td>An object that contains information about the input (varies based on
+        <code>Enum.UserInputType</code>). The <code>Class.InputObject</code> sometimes won't match the inputs the action
+        was bound to: when the <code>Enum.UserInputState|Cancel</code> state is sent, this object will be
+        <code>Enum.KeyCode.Unknown</code> and <code>Enum.UserInputType.None</code>.</td>
       </tr>
       </table>
 
-      † This allows one function to handle multiple actions at once, if
-      necessary. \*Cancel is sent if some input was in-progress and another
-      action bound over the in-progress input, or if the in-progress bound
-      action was `Class.ContextActionService:UnbindAction()|unbound`.
-
       #### Action Bindings Stack
 
       Action bindings behave like a stack: if two actions are bound to the same