Editorial: Fix two simple typos (#3454)

spec.html

@@ -42372,7 +42372,7 @@ <h1>Abstract Operations For Set Objects</h1>
 
       <emu-clause id="sec-set-records">
         <h1>Set Records</h1>
-        <p>An <dfn variants="Set Records">Set Record</dfn> is a Record value used to encapsulate the interface of a Set or similar object.</p>
+        <p>A <dfn variants="Set Records">Set Record</dfn> is a Record value used to encapsulate the interface of a Set or similar object.</p>
         <p>Set Records have the fields listed in <emu-xref href="#table-set-record-fields"></emu-xref>.</p>
         <emu-table id="table-set-record-fields" caption="Set Record Fields">
           <table>
@@ -45552,7 +45552,7 @@ <h1>Atomics.wait ( _typedArray_, _index_, _value_, _timeout_ )</h1>
 
     <emu-clause id="sec-atomics.waitasync">
       <h1>Atomics.waitAsync ( _typedArray_, _index_, _value_, _timeout_ )</h1>
-      <p>This function returns a Promise that is resolved when the calling agent is notified or the the timeout is reached.</p>
+      <p>This function returns a Promise that is resolved when the calling agent is notified or the timeout is reached.</p>
       <p>It performs the following steps when called:</p>
       <emu-alg>
         1. Return ? DoWait(~async~, _typedArray_, _index_, _value_, _timeout_).