[Extensions pages] Fix broken link to options page

Change link from https://developer.chrome.com/optionsV2 to
https://developer.chrome.com/options

To reproduce locally, start up the docserver using:

python chrome/common/extensions/docs/server2/preview.py

then navigate to the getting started page

Bug: 968489
Change-Id: I114d503290abe7ad564d3d13d1c57ebcab058c46
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1827511Reviewed-by: Istiaque Ahmed <lazyboy@chromium.org>
Commit-Queue: Istiaque Ahmed <lazyboy@chromium.org>
Auto-Submit: Kelvin Jiang <kelvinjiang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#700906}

chrome/common/extensions/docs/templates/articles/getstarted.html

@@ -5,7 +5,7 @@
   Components can include
   <a href="/background_pages.html">background scripts</a>,
   <a href="/content_scripts.html">content scripts</a>,
-  an <a href="/optionsV2">options page</a>,
+  an <a href="/options">options page</a>,
   <a href="/user_interface.html">UI elements</a>
   and various logic files.
   Extension components are created with web development technologies: