increase mainnet rpc volume

[wanwiset25]

Proposed changes

Increase ec2 volume since our internal mainnet rpc ran out of space.

Types of changes

What types of changes does your code introduce to XDC network? Put an ✅ in the boxes that apply

• [ ] Bugfix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Documentation Update (if none of the other choices apply)
• [ ] Regular KTLO or any of the maintaince work. e.g code style
• [x] CICD Improvement

Impacted Components

Which part of the codebase this PR will touch base on,

Put an ✅ in the boxes that apply

• [ ] Consensus
• [ ] Account
• [ ] Network
• [ ] Geth
• [ ] Smart Contract
• [x] External components
• [ ] Not sure (Please specify below)

Checklist

Put an ✅ in the boxes once you have confirmed below actions (or provide reasons on not doing so) that

• [ ] This PR has sufficient test coverage (unit/integration test) OR I have provided reason in the PR description for not having test coverage
• [ ] Provide an end-to-end test plan in the PR description on how to manually test it on the devnet/testnet.
• [ ] Tested the backwards compatibility.
• [ ] Tested with XDC nodes running this version co-exist with those running the previous version.
• [ ] Relevant documentation has been updated as part of this PR
• [x] tested with terraform plan