Update Copyright text to include IBM

[DanielChenTO]

📌 Summary

Update Copyright text from "HashiCorp" to "HashiCorp, an IBM Company".

🔗 External links

Jira ticket: HDS-5552

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👀 Component checklist

• [] Percy was checked for any visual regression
• [] A changelog entry was added via Changesets if needed (see templates here)

💬 Please consider using conventional comments when reviewing this PR.

📋 PCI review checklist

• [] If applicable, I've documented a plan to revert these changes if they require more than reverting the pull request.
• [] If applicable, I've worked with GRC to document the impact of any changes to security controls.
  Examples of changes to controls include access controls, encryption, logging, etc.
• [] If applicable, I've worked with GRC to ensure compliance due to a significant change to the in-scope PCI environment.
  Examples include changes to operating systems, ports, protocols, services, cryptography-related components, PII processing code, etc.

[vercel]

@DanielChenTO is attempting to deploy a commit to the HashiCorp Team on Vercel.

A member of the Team first needs to authorize it.

[hashicorp-cla-app]

Thank you for your submission! We require that all contributors sign our Contributor License Agreement ("CLA") before we can accept the contribution. Read and sign the agreement

Learn more about why HashiCorp requires a CLA and what the CLA includes

_{Have you signed the CLA already but the status is still pending? Recheck it.}

[hashicorp-cla-app]

Thank you for your submission! We require that all contributors sign our Contributor License Agreement ("CLA") before we can accept the contribution. Read and sign the agreement

Learn more about why HashiCorp requires a CLA and what the CLA includes

_{Have you signed the CLA already but the status is still pending? Recheck it.}

[alex-ju]

@DanielChenTO thanks for your first contribution to our repo!

To move this PR forward, we’ll need two things:

• a signed CLA
• a changelog entry for this patch that reads:

`AppFooter` - Updated copyright text

[KristinLBradley]

Hi @DanielChenTO, thanks for your submission. I have another PR open to update the copyright though if you want to go ahead and close this one.