operator-sdk: git revision update for v1.42.0 release

[stefanb]

• Have you followed the guidelines for contributing?
• Have you ensured that your commits follow the commit style guide?
• Have you checked that there aren't other open pull requests for the same formula update/change?
• Have you built your formula locally with HOMEBREW_NO_INSTALL_FROM_API=1 brew install --build-from-source <formula>, where <formula> is the name of the formula you're submitting?
• Is your test running fine brew test <formula>, where <formula> is the name of the formula you're submitting?
• Does your build pass brew audit --strict <formula> (after doing HOMEBREW_NO_INSTALL_FROM_API=1 brew install --build-from-source <formula>)? If this is a new formula, does it pass brew audit --new <formula>?

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Found in

• go 1.26rc1, [email protected] 1.25.5 (new formula) #258912

Diff: operator-framework/operator-sdk@1b9cb8d...ab5563d

Upstream ref:

• GPG signing key expired - blocking releases operator-framework/operator-sdk#7012
• update signing keys operator-framework/operator-sdk#7017