[PR] Change wording on the landing page - ‘Coworkers’

Summary:
Currently, on the landing page it reads:
‘Flow can help prevent bad rebases. Flow can help **protect** your carefully designed library **from your coworkers**.’ (Emphasis mine)

I do not want to protect my library from coworkers. I want them to be able to quickly and safely contribute.

In this PR I suggest ‘protect […] from errors’. However, I'd be happy with other changes.
Pull Request resolved: facebook#6476

Reviewed By: pakoito

Differential Revision: D9338799

Pulled By: mrkev

fbshipit-source-id: 6d9c5080313efaa37b04c0a65f2fb302a038ffd5

website/_data/i18n/en.yml

@@ -37,8 +37,8 @@ homepage_code_bigger_img_alt: ""
 homepage_code_bigger_description: >
   Working in a codebase with lots of developers can make it difficult to keep
   your master branch working. Flow can help prevent bad rebases. Flow can help
-  protect your carefully designed library from your coworkers. And Flow can help
-  you understand the code you wrote six months ago.
+  protect your carefully designed library from misuse and misinterpretation.
+  And Flow can help you understand the code you wrote six months ago.
 
 homepage_featurettes:
   - title: "Type Inference"