Enhancement: Bump docker 20.10 variants to 20.10.26 #429

Job	Run time
test-nogitdiff	24s
build-4-18-0	1m 15s
build-4-15-0	5m 25s
build-4-14-1	1m 9s
build-4-16-1	7m 51s
build-4-17-1	4m 57s
build-4-12-0	1m 5s
build-4-13-0	5m 24s
build-4-10-1	1m 5s
build-4-11-0	1m 22s
build-4-6-1	1m 24s
build-4-7-1	1m 15s
build-4-8-3	1m 22s
build-4-9-1	1m 8s
publish-draft-release	0s
update-dockerhub-description	0s
update-draft-release	0s
	35m 6s

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