Update release support in security policy (backport #11773)

[mergify]

This is an automatic backport of pull request #11773 done by Mergify.
Cherry-pick of 63c922e has failed:

On branch mergify/bp/stable/1.0/pr-11773
Your branch is up to date with 'origin/stable/1.0'.

You are currently cherry-picking commit 63c922e61.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   SECURITY.md

no changes added to commit (use "git add" and/or "git commit -a")

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[qiskit-bot]

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[coveralls]

Pull Request Test Coverage Report for Build 7874160169

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 15 unchanged lines in 3 files lost coverage.
• Overall coverage decreased (-0.006%) to 89.207%

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Files with Coverage Reduction	New Missed Lines	%
crates/qasm2/src/expr.rs	1	93.81%
crates/qasm2/src/lex.rs	2	92.19%
crates/qasm2/src/parse.rs	12	97.15%

Totals
Change from base Build 7872689331:	-0.006%
Covered Lines:	58825
Relevant Lines:	65942

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💛 - Coveralls