fix typos and broken link

Overview.html

@@ -1434,7 +1434,7 @@ <h3 id="x3.2-the-consume()-method"><span class="secno">3.2 </span>The <dfn data-
             <h3 id="x3.3-the-expose()-method"><span class="secno">3.3 </span>The <dfn data-dfn-for="wot" data-dfn-type="dfn" id="dom-wot-expose()" data-idl="" data-title="expose()" data-lt="expose()|expose"><code>expose()</code></dfn> method</h3>
             <p>
                 Returns a <code><a href="#dfn-promise" class="internalDFN" data-link-type="dfn">Promise</a></code> of a locally created <a href="#dom-exposedthing" class="internalDFN" data-link-type="dfn"><code>ExposedThing</code></a> based on the provided
-                initialization paramaters.
+                initialization parameters.
             </p>
             <div class="ednote">
                 <div class="ednote-title marker" aria-level="4" role="heading" id="h-ednote5"><span>Editor's note</span></div>
@@ -1661,7 +1661,7 @@ <h5 id="x4.9.2.1-the-actioninvocationeventinit-dictionary"><span class="secno">4
                     <div class="ednote">
                         <div class="ednote-title marker" aria-level="6" role="heading" id="h-ednote8"><span>Editor's note</span></div>
                         <p class="">
-                            Action parameters could be also included, but it's debateble because privacy reasons.
+                            Action parameters could be also included, but it's debatable because privacy reasons.
                         </p>
                     </div>
                     <p>
@@ -1683,7 +1683,7 @@ <h4 id="x4.9.3-the-thingdescriptionchangeevent-interface"><span class="secno">4.
 };</span></pre>
                 </div>
                 <p>
-                    The <dfn data-dfn-for="thingdescriptionchangeevent" data-dfn-type="dfn" id="dom-thingdescriptionchangeevent-data" data-idl="" data-title="data"><code>data</code></dfn> attribute represents the changes that occured to the <a href="#dfn-thing-description"
+                    The <dfn data-dfn-for="thingdescriptionchangeevent" data-dfn-type="dfn" id="dom-thingdescriptionchangeevent-data" data-idl="" data-title="data"><code>data</code></dfn> attribute represents the changes that occurred to the <a href="#dfn-thing-description"
                         class="internalDFN" data-link-type="dfn">Thing Description</a>.
                 </p>
                 <section data-dfn-for="ThingDescriptionChangeEventInit" id="the-thingdescriptionchangeeventinit-dictionary">