Update proposals/hasCrossSiteAncestor.md

Co-authored-by: bvandersloot-mozilla <[email protected]>

proposals/hasCrossSiteAncestor.md

@@ -150,7 +150,7 @@ If no `hasCrossSiteAncestor` value is provided it will be populated using the al
 If no value is set for hasCrossSiteAncestor cookies with both true and false values for `hasCrossSiteAncestor` will be returned. Otherwise, cookies will be returned that match the `topLevelSite` and the passed value for `hasCrossSiteAncestor`. When the `partitionKey` property is not specified, only unpartitioned cookies are returned. These cookies always have a `false` value for `hasCrossSiteAncestor`. If a `hasCrossSiteAncestor` value is provided without a corresponding `topLevelSite` value, an error will be returned.
 
 - `cookies.set()`: 
-As described the Abuse Mitigations section, this method will not allow a `hasCrossSiteAncestor` value of false, if the URL associated with the cookie and the `topLevelSite` in the `partitionKey` are not first-party. If this is attempted, an error will be returned. If a `hasCrossSiteAncestor` value is provided without a corresponding `topLevelSite` value, an error will be returned. Additionally, if no `hasCrossSiteAncestor` value is provided it will be populated using the algorithm described above.
+As described the Abuse Mitigations section, this method will not allow a `hasCrossSiteAncestor` value of false if the URL associated with the cookie and the `topLevelSite` in the `partitionKey` are not first-party. If this is attempted, an error will be returned. If a `hasCrossSiteAncestor` value is provided without a corresponding `topLevelSite` value, an error will be returned. Additionally, if no `hasCrossSiteAncestor` value is provided it will be populated using the algorithm described above.
 
 - `cookies.remove()`:
 If no `hasCrossSiteAncestor` value is provided it will be populated using the algorithm described above when determing the cookie to remove. If a `hasCrossSiteAncestor` value is provided without a corresponding `topLevelSite` value, an error will be returned. If `topLevelSite` and `hasCrossSiteAncestor` values are provided, they will be used by the method even if the combination of the values would be invalid.