Add grow-inc emojis

[itsrobli]

Description

GROW Inc is a fintech company located in Sydney, Australia.

GROW's mission is to empower businesses, developers and entrepreneurs to create the future of finance.

https://www.grow.inc

PR checklist

• [X] The image is 64x64 PNG image
• [X] Image is added to img-buildkite-64 directory
• [X] Image is referenced in img-buildkite-64.json file
• [X] Image is referenced in README markdown file
• [X] The image can be hosted by Buildkite and made available in Buildkite UI

[itsrobli]

One of my colleagues said it would be nice to have the company emoji in our Buildkite pipeline. Please make my day. 🙏 😄