chore: tidy up index.html (#378)

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

Author: github-actions[bot]

index.html

@@ -683,11 +683,11 @@ <h3>
           object</a> for <a>this</a>. See [=/HTTP fetch=] for more info.
         </p>
         <p data-dfn-for="PerformanceResourceTiming">
-          The <dfn>firstInterimResponseStart</dfn> getter steps are to <a>convert fetch
-          timestamp</a> for <a>this</a>'s <a data-for=
+          The <dfn>firstInterimResponseStart</dfn> getter steps are to
+          <a>convert fetch timestamp</a> for <a>this</a>'s <a data-for=
           "PerformanceResourceTiming">timing info</a>'s [=fetch timing
-          info/first interim network-response start time=] and the <a>relevant global
-          object</a> for <a>this</a>. See [=/HTTP fetch=] for more info.
+          info/first interim network-response start time=] and the <a>relevant
+          global object</a> for <a>this</a>. See [=/HTTP fetch=] for more info.
         </p>
         <p data-dfn-for="PerformanceResourceTiming">
           The <dfn>responseStart</dfn> getter steps are to <a>convert fetch