feat(security): Adds security policy to repo

[darigovresearch]

Closes https://github.com/NethermindEth/sedge/issues/370 if merged

Changes:

Adds placeholder Security.md adapted from another repo

Adapted from https://github.com/NethermindEth/nethermind/blob/master/SECURITY.md

Types of changes

What types of changes does your code introduce? Put an x in the boxes that apply

• [x] Bugfix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] Documentation Update
• [ ] Code style update (formatting, renaming)
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [ ] Other (please describe):

Testing

Requires testing

• [ ] Yes
• [x] No

In case you checked yes, did you write tests?

• [ ] Yes
• [ ] No

Comments about testing , should you have some (optional)

[stdevMac]

With that small change, will be ready to merge, good catch! @darigovresearch

[darigovresearch]

Thanks for the feedback @stdevMac, adjustments should now be in the pull request

Do you need anything else to merge this pull request?