chore: add integrity attribute to external links #5305

Job	Run time
file_changes	5s
Build application and assets	6m 19s
Build Docker image	7m 23s
Linting / Elixir	3m 41s
Formatting / JavaScript & TypeScript	27s
Formatting / Elixir	3m 17s
Linting / TypeScript	35s
Unit tests / JavaScript / Mocha	37s
Unit tests / JavaScript & TypeScript / Jest	2m 10s
Linting / JavaScript	31s
Linting / CSS	25s
Type checks / Elixir	3m 54s
Type checks / TypeScript	32s
Unit tests / Elixir / mix coveralls.html	57s
	30m 53s

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