MINOR: Fix typo dev guide title
related to
Author: Joel Hamill <git config --global user.email>
Reviewers: Guozhang Wang
Closes from joel-hamill/dev-guide-title
<div class="sticky-top">
<div style="height:35px">
<a class="active-menu-item" href="#">Introduction</a>
- <a href="/{{version}}/documentation/streams/developer-guide">Developers Guide</a>
+ <a href="/{{version}}/documentation/streams/developer-guide">Developer Guide</a>
<a href="/{{version}}/documentation/streams/core-concepts">Concepts</a>
<a href="/{{version}}/documentation/streams/quickstart">Run Demo App</a>
<a href="/{{version}}/documentation/streams/tutorial">Tutorial: Write App</a>
