Update reading log help link on patron exports page (#11340)

* Update text for reading log explanation

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: jimchamp

openlibrary/i18n/messages.pot

@@ -2546,7 +2546,7 @@ msgid "Download a copy of your reading log."
 msgstr ""
 
 #: account/import.html
-msgid "What is this?"
+msgid "What is a reading log?"
 msgstr ""
 
 #: account/import.html

openlibrary/templates/account/import.html

@@ -21,7 +21,7 @@ <h3>$_("Import from Goodreads")</h3>
       </div>
       <div class="import-export__section">
         <h3>$_("Export your Reading Log")</h3>
-        <p>$_("Download a copy of your reading log.") <a href="/help/faq/reading-log.en#reading-log">$_("What is this?")</a></p>
+        <p>$_("Download a copy of your reading log.") <a href="/help/faq/reading-log.en#reading-log">$_("What is a reading log?")</a></p>
         <form method="GET" action="/account/export"
             enctype="multipart/form-data" class="olform olform--decoration">
           <input type="hidden" name="type" value="reading_log">