Update references to match "master" branch

[garrucho]

Update some references to match the master branch.

What problem is this solving?

I didn't found any reference about removePaymentLoading.vtex on the sample code, and so I've noted that wasn't checking in their latest version.

Type of changes

✔️	Type of Change
✔️	Bug fix
_	New feature
_	Breaking change
_	Technical improvements

[vtex-io-ci-cd]

Hi! I'm VTEX IO CI/CD Bot and I'll be helping you to publish your app! 🤖

Please select which version do you want to release:

• Patch

• Minor

• Major

And then you just need to merge your PR when you are ready! There is no need to create a release commit/tag.

• No thanks, I would rather do it manually 😞

[vtex-io-docs-bot]

Beep boop 🤖

I noticed you didn't make any changes at the docs/ folder

• There's nothing new to document 🤔
• I'll do it later 😞

In order to keep track, I'll create an issue if you decide now is not a good time

• I just updated 🎉🎉