docs: update SECURITY.md

[pucedoteth]

Description

Closes: #XXXX

---

Author Checklist

All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.

I have...

• included the correct type prefix in the PR title
• added ! to the type prefix if API or client breaking change
• targeted the correct branch (see PR Targeting)
• provided a link to the relevant issue or specification
• followed the guidelines for building modules
• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
• included comments for documenting Go code
• updated the relevant documentation or specification
• reviewed "Files changed" and left comments if necessary
• confirmed all CI checks have passed

Reviewers Checklist

All items are required. Please add a note if the item is not applicable and please add
your handle next to the items reviewed if you only reviewed selected items.

I have...

• confirmed the correct type prefix in the PR title
• confirmed ! in the type prefix if API or client breaking change
• confirmed all author checklist items have been addressed
• reviewed state machine logic
• reviewed API design and naming
• reviewed documentation is accurate
• reviewed tests and test coverage
• manually tested (if applicable)

[rach-id]

If we want to change this to reference the fork's specs, then these also should be changed to point to our fork:

### Core packages
* [`/baseapp`](https://github.com/cosmos/cosmos-sdk/tree/main/baseapp)
* [`/crypto`](https://github.com/cosmos/cosmos-sdk/tree/main/crypto)
* [`/types`](https://github.com/cosmos/cosmos-sdk/tree/main/types)
* [`/store`](https://github.com/cosmos/cosmos-sdk/tree/main/store)
### Modules
* [`x/auth`](https://github.com/cosmos/cosmos-sdk/tree/main/x/auth)
* [`x/bank`](https://github.com/cosmos/cosmos-sdk/tree/main/x/bank)
* [`x/capability`](https://github.com/cosmos/cosmos-sdk/tree/main/x/capability)
* [`x/staking`](https://github.com/cosmos/cosmos-sdk/tree/main/x/staking)
* [`x/slashing`](https://github.com/cosmos/cosmos-sdk/tree/main/x/slashing)
* [`x/evidence`](https://github.com/cosmos/cosmos-sdk/tree/main/x/evidence)
* [`x/distribution`](https://github.com/cosmos/cosmos-sdk/tree/main/x/distribution)
* [`x/mint`](https://github.com/cosmos/cosmos-sdk/tree/main/x/mint)

and any other thing in this file pointing to upstream.

CC @MSevey what do you think?