Bump JamesIves/github-pages-deploy-action from 4.6.8 to 4.6.9 #755

Job	Run time
docker-master	1h 31m 20s
publish-standalone-dry-run	23s
test-standalone (master, dev, default)	1m 57s
build-js-of-ocaml (master, 4.11.1)	12m 35s
build-wasm-of-ocaml (master, 4.14.1)	9m 59s
generated-files (master)	23m 33s
standalone-haskell (master)	46m 47s
test-amd64	2h 16m 27s
validate-docker-master	2m 28s
deploy-js-wasm-of-ocaml	0s
docker-check-all	8s
	5h 25m 37s

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