Chore/bump prom client

[filafb]

What is the purpose of this pull request?

This version bumps the prom-client version to remove a deprecation warning in the CLI when linking a project to the node builder using node 16.

What problem is this solving?

It removes the following deprecation warning from CLI when linking an application.

How should this be manually tested?

• Create a new workspace in vtexgame1 account;
• Run yarn link in the node-vtex-api;
• Open a project using the node builder and update the version to 7.x;
• In the same project, cd to /node and run yarn link @vtex/api;
• Link the project to the workspace. You should not see the warning above.

Types of changes

• Bug fix (a non-breaking change which fixes an issue)
• New feature (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Requires change to documentation, which has been updated accordingly.

[eduardocesb]

LGTM ✅