Fix a host permissions typo in docs

chrome/common/extensions/docs/templates/intros/declarativeWebRequest.html

 <h2 id="manifest">Manifest</h2>
 
 <p>
 You must declare the "declarativeWebRequest" permission in the
 <a href="manifest.html">extension manifest</a> to use this API,
 along with <a href="declare_permissions.html">host permissions</a>.
 </p>
 
 <pre>{
   "name": "My extension",
   ...
 <b>  "permissions": [
     "declarativeWebRequest",
-    "*://*.google.com"
+    "*://*/*"
   ]</b>,
   ...
 }</pre>
 
 <p>
 Note that certain types of non-sensitive actions do not require host
 permissions:
 <ul>
   <li><code>CancelRequest</code>
   <li><code>IgnoreRules</code>
   <li><code>RedirectToEmptyDocument</code>
   <li><code>RedirectToTransparentImage</code>
 </ul>
 </p>
 <p>
 The <code>SendMessageToExtension</code> action requires host permissions
 for any hosts whose network requests you want to trigger a message.
 </p>
 <p>
 All other actions require host permissions to all URLs.
 </p>
 <p>
-As an example, if <code>"*://*.google.com"</code> is the only host permission an
-extension has, than such an extension may set up a rule to
+As an example, if <code>"*://*.google.com/*"</code> is the only host permission
+an extension has, than such an extension may set up a rule to
 <ul>
   <li> cancel a request to "http://www.google.com" or "http://anything.else.com"
   <li> send a message when navigating to "http://www.google.com" but not to
 "http://something.else.com"
 </ul>
 The extension cannot set up a rule to redirect "http://www.google.com" to
 "http://mail.google.com".
 </p>
 
 <h2 id="rules">Rules</h2>
@@ skipping 191 matching lines @@
 chrome.declarativeWebRequest.onRequest.addRules([rule1, rule2]);
 </pre>
 
 <p>
 It is important to recognize that the <code>IgnoreRules</code> action is not
 persisted across <a href="#evaluation">request stages</a>. All conditions of
 all rules are evaluated at each stage of a web request. If an
 <code>IgnoreRules</code> action is executed, it applies only to other actions
 that are executed for the same web request in the same stage.
 </p>