Update CLA github action to v2.3.0

[Uxio0]

Github will stop supporting NodeJS 12 (used by the current version) and this new version uses NodeJS 16

[github-actions[bot]]

Pull Request Test Coverage Report for Build 4915132629

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 7 unchanged lines in 1 file lost coverage.
• Overall coverage remained the same at 97.071%

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Files with Coverage Reduction	New Missed Lines	%
contracts/SafeL2.sol	7	0%
<!--	Total:	7		-->

Totals
Change from base Build 4809400578:	0.0%
Covered Lines:	308
Relevant Lines:	316

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💛 - Coveralls

[Uxio0]

To clarify, since there's no description - is this just a routine dependency bump, or we're missing some functionality that's added in this version?

Github will stop supporting NodeJS 12 and this new version uses NodeJS 16