Update submodules/gatekeeper-library digest to 138d24a #5335

Job	Run time
Checkout	8s
Generate a semantic version number	13s
js-get-deps	16s
codeql	1m 22s
js-build-binaries	44s
js-units	23s
build-web-ui	18s
publish-web-ui	0s
policytests (psp, fixtures)	1m 46s
policytests (gatekeeper, fixtures)	3m 15s
release-binaries	0s
policytests (kyverno, fixtures)	2m 31s
policytests (kubewarden, fixtures)	22m 56s
policytests (pss, fixtures)	3m 6s
policytests (krail, fixtures)	55s
policytests (kubewarden, e2e)	23m 15s
policytests (gatekeeper, e2e)	2m 44s
policytests (kyverno, e2e)	2m 30s
	1h 6m 22s

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