Fix erroneously-updated file path (#706)

RWS-Submission_Guidelines.md

@@ -91,7 +91,7 @@ Upon submission of a PR, a series of technical checks will run on GitHub to veri
 <li>Each domain must satisfy the /.well-known/ metadata requirement:</li>
   <ul>
     <li>The /.well-known/ metadata requirement demonstrates that the submitter has administrative access to the domains present in the set, since administrative access is required to modify the /.well-known/ file. This will help prevent unauthorized actors from adding domains to a set. </li>
-    <li>The primary domain must serve a JSON file at /.well-known/related-website-set.json (Note: list entries merged before September 15th 2023 may serve their well-known file at /.well-known/related-website-set.json instead; however, any changes to those entries will require that the primary and all members of the set must be served at /.well-known/related-website-set.json like any other entry). The contents of the file must be identical to the submission. Each member domain must serve a JSON file at /.well-known/related-website-set.json. The contents of the file must name the primary domain. These files must be maintained for the duration of the domain’s inclusion in the set.</li>
+    <li>The primary domain must serve a JSON file at /.well-known/related-website-set.json (Note: list entries merged before September 15th 2023 may serve their well-known file at /.well-known/first-party-set.json instead; however, any changes to those entries will require that the primary and all members of the set must be served at /.well-known/related-website-set.json like any other entry). The contents of the file must be identical to the submission. Each member domain must serve a JSON file at /.well-known/related-website-set.json. The contents of the file must name the primary domain. These files must be maintained for the duration of the domain’s inclusion in the set.</li>
     <li>Any changes to an existing RWS in the <a href="https://github.com/googlechrome/first-party-sets/blob/main/related_website_sets.JSON">canonical RWS list</a>  must also be reflected in that set's JSON files at /.well-known/related-website-set.json.</li>
     <li>If an RWS owner wishes to remove a set entirely from the <a href="https://github.com/googlechrome/first-party-sets/blob/main/related_website_sets.JSON">canonical RWS list,</a> then that set's primary must serve a `404 (Not Found)` status code at their /.well-known/related-website-set.json endpoint to demonstrate a deliberate desire to remove the set.</li>
 		<li>Example for  primary.com/.well-known/related-website-set.json:</li>