Fix typo in installation commands

[didierganthier]

Fix typo in installation commands

Checklist

• I have read this repository's contribution guidelines.
• My pull request has a descriptive title (not a vague title like Update index.MD)
• My pull request targets the master branch of this project.
• I added relevant documentation for all the files I changed

Summary

I removed the $ in the installation commands as it is not necessary when copying the command (the terminal already has it) and will throw an error if pasted in the terminal with it. I always have to remove it whenever I'm copying it here.

What changes have been made?

• Change $ bundle to bundle
• Change $ gem install devise-tailwindcssed to gem install devise-tailwindcssed

Author

• @didierganthier