Update submodules/gatekeeper-library digest to e8ca0c8 #5412

Job	Run time
Checkout	7s
Generate a semantic version number	13s
codeql	1m 22s
js-get-deps	17s
js-units	20s
js-build-binaries	46s
build-web-ui	13s
publish-web-ui	0s
policytests (psp, fixtures)	1m 44s
release-binaries	0s
policytests (gatekeeper, fixtures)	2m 43s
policytests (kyverno, fixtures)	2m 20s
policytests (kubewarden, fixtures)	23m 27s
policytests (pss, fixtures)	2m 48s
policytests (krail, fixtures)	47s
policytests (kubewarden, e2e)	23m 16s
policytests (gatekeeper, e2e)	2m 21s
policytests (kyverno, e2e)	2m 28s
	1h 5m 12s

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