Add blukesky logo to <EsIcon> list of icons #441

Job	Run time
Percy Tests	2m 46s
Lint	23s
Floating Dependencies	51s
Tests	39s
ember-canary - Allowed to fail	1m 0s
ember-release-no-deprecations - Allowed to fail	54s
ember-lts-4.4	57s
ember-lts-4.12	1m 0s
ember-lts-5.8	1m 2s
embroider-safe	1m 2s
ember-lts-5.4	59s
ember-release	56s
embroider-optimized	57s
ember-beta	55s
ember-lts-4.8	59s
ember-lts-3.28	1m 10s
no-deprecations	56s
	17m 26s

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