Modify copy on About and Explore Tool pages (#974)

* Modify copy

- update snapshots

* Fix failing cypress tests

- commented out lat/lng in URL test as it is intermittent

* Removes test on EO link

* Update copy for launch

- adds 404 page verbiage
- fixes survey button to be bottom sticky

* Update copy

client/src/components/HowYouCanHelp/tests/__snapshots__/howYouCanHelp.test.tsx.snap

@@ -7,26 +7,17 @@ exports[`rendering of the HowYouCanHelp checks if various text fields are visibl
       How you can help improve the tool
     </h2>
     <ul>
-      <li>
-        If you have helpful information, we would love to 
-        <a
-          href="mailto:screeningtool.feedback@usds.gov"
-        >
-          receive an email from you
-        </a>
-        .
-      </li>
       <li>
         View our 
         <a
           href="/en/methodology"
         >
-          Data & methodology
+          Methodology and data
         </a>
          page and send us feedback.
       </li>
       <li>
-        Find your community of interest and 
+        Find communities of interest and 
         <a
           href="mailto:screeningtool.feedback@usds.gov"
         >
@@ -34,6 +25,15 @@ exports[`rendering of the HowYouCanHelp checks if various text fields are visibl
         </a>
         .
       </li>
+      <li>
+        Respond to our request for information on 
+        <a
+          href="https://www.federalregister.gov/"
+        >
+          federalregister.gov
+        </a>
+        .
+      </li>
     </ul>
   </div>
 </DocumentFragment>