Rename one of the "current wall time" dfns (#167)

* Current coarsen wall time

* coarsened

index.html

@@ -398,13 +398,13 @@ <h3>
       </p>
       <p>
         For measuring time across multiple UA executions, create [=moments=]
-        using the [=current wall time=] or (if you need higher precision in
-        [=environment settings object/cross-origin isolated
+        using the [=current coarsened wall time=] or (if you need higher
+        precision in [=environment settings object/cross-origin isolated
         capability|cross-origin-isolated contexts=]) an [=environment settings
         object=]'s [=environment settings object/current wall time=]. The
-        <dfn data-export="" id="dfn-current-wall-time">current wall time</dfn>
-        is the result of calling [=coarsen time=] with the [=wall clock=]'s
-        [=wall clock/unsafe current time=].
+        <dfn data-export="" id="dfn-current-wall-time">current coarsened wall
+        time</dfn> is the result of calling [=coarsen time=] with the [=wall
+        clock=]'s [=wall clock/unsafe current time=].
       </p>
       <p>
         An [=environment settings object=] |settingsObject:environment settings