Add Responsive Text in voter registration Help page

[Kaizh3]

Fixes #408

You can text the mobile view in this website http://mattkersley.com/responsive/

Describe the changes you've made

I add responsive text style in help.html, remove the class of input-row

Describe if there is any unusual behaviour of your code(Write NA if there isn't)

NA

Deploy your changes to github page or netlify and mention deployment link:

NA

Additional context (OPTIONAL)

Add any other context or screenshots about the feature request here.

Test plan (OPTIONAL)

A good test plan should give instructions that someone else can easily follow. How someone can test your code?

Checklist

• [x] I have mentioned related issue number in PR description.
• [x] I have added screenshots and related demo links of my changes..
• [x] The title of my pull request is a short description of the requested changes.
• [x] My code follows the code style of this project.
• [x] My change requires a change to the documentation.
• [x] I have updated the documentation accordingly.
• [ ] Open Source Program names(OPTIONAL: If you participated in any open-source program then please mention the program name here)

[QAZIMAAZARSHAD]

Fetch upstream your repo is 11 commits behind.

[Kaizh3]

i done git pull upstream master then continue steps 7 until 11?