Fix typo in xml example

This was noticed by @deining in #428

Closes #428

examples/xml/xml.go

@@ -41,7 +41,7 @@ func main() {
 	// it explicitly.
 	fmt.Println(xml.Header + string(out))
 
-	// Use `Unmarhshal` to parse a stream of bytes with XML
+	// Use `Unmarshal` to parse a stream of bytes with XML
 	// into a data structure. If the XML is malformed or
 	// cannot be mapped onto Plant, a descriptive error
 	// will be returned.

examples/xml/xml.hash

@@ -1,2 +1,2 @@
-d5da1784f3aa0bbba452d21c70833621a62159f4
-RsNLhMBazeX
+4b9dfaf797591099f6fcb762241289b1662a9250
+OVq7kNMk0GR

public/xml

@@ -42,7 +42,7 @@ formats with the <code>encoding.xml</code> package.</p>
             
           </td>
           <td class="code leading">
-            <a href="https://go.dev/play/p/RsNLhMBazeX"><img title="Run code" src="play.png" class="run" /></a><img title="Copy code" src="clipboard.png" class="copy" />
+            <a href="https://go.dev/play/p/OVq7kNMk0GR"><img title="Run code" src="play.png" class="run" /></a><img title="Copy code" src="clipboard.png" class="copy" />
           <pre class="chroma"><span class="kn">package</span> <span class="nx">main</span>
 </pre>
           </td>
@@ -145,7 +145,7 @@ it explicitly.</p>
         
         <tr>
           <td class="docs">
-            <p>Use <code>Unmarhshal</code> to parse a stream of bytes with XML
+            <p>Use <code>Unmarshal</code> to parse a stream of bytes with XML
 into a data structure. If the XML is malformed or
 cannot be mapped onto Plant, a descriptive error
 will be returned.</p>