chore: Change deprecated Redis plan on Heroku

[NickCirculy]

Description

Heroku deprecated the Hobby-dev plan for Redis, this prevents "deploying" AppSmith on Heroku by using the install Template. Instead now Heroku expects a Mini plan.

Fixes # (issue)
Deployment issue.

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

After changing the app.json to require: heroku-redis:mini i was able to install AppSmith on Heroku by using the template.

Checklist:

Dev activity

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• PR is being merged under a feature flag

QA activity:

• Test plan has been approved by relevant developers
• Test plan has been peer reviewed by QA
• Cypress test cases have been added and approved by either SDET or manual QA
• Organized project review call with relevant stakeholders after Round 1/2 of QA
• Added Test Plan Approved label after reveiwing all Cypress test

[welcome]

Welcome to the Appsmith community! Thank you for your first pull request and making this project better. 🤗 Please make sure that you raise a review request so your code change does not go unnoticed.

[vercel]

@NickCirculy is attempting to deploy a commit to the Appsmith Team on Vercel.

A member of the Team first needs to authorize it.

[mohanarpit]

@sum35h Can we please test the suggested template change on Heroku?

[github-actions]

This PR has not seen activitiy for a while. It will be closed in 7 days unless further activity is detected.