docs: Correct a broken link

[Ruttmann]

Correct the summary link to Contribution Guidelines subsection.

Close #69. [skip ci]

Changes proposed
Just corrected the line 68 of the README.md file, according to my comment on issue #69

From:
- [Contribution Guidelines](#contributing-guide)

To:
- [Contribution Guidelines](#contribution-guidelines)

[Ruttmann]

I did a second commit, because my Prettier config has changed some double quotes at the code blocks. Now everything is correct again.

[pellizzetti]

It seems that there are some changes that weren't reverted in your last commit. Commit the full revert and we are ready to merge! 😄

--- (optional)
You could also add the remaining changes in your last commit using: git commit --amend --no-edit and git push -f

And, if you want to go a step further, use git rebase -i on your branch to squash the reverting commit onto the first commit.

[Ruttmann]

I'm facing some problems with VSCode, most specifc, Prettier is somehow taking out all the semicolons that I add at the end of a function. I have deleted all Prettier configs in settings.json, but the problem still. Do you know how can I correct that? I have ESLint and Prettier correctly installed to VSCode and the only configuration regarding Prettier in my settings.json are the following:

"prettier.eslintIntegration": true,
"prettier.semi": true

Anyone knows what can I do to avoid that?

[diego3g]

@Ruttmann Try merging our master branch to you fork and try again. We made some changes to prettier and eslint.

[Ruttmann]

I've made a new commit. Can you please verify if everything is ok now?

[pellizzetti]

Fixing conflicts on this branch, I ended up realizing that a PR (#35) that was merged earlier today solved this.

Sorry about that, we are grateful for your contribution. ❤️