Test

Update instructions #440

Job	Run time
test_course_definition / test_stage_descriptions	24s
test_course_definition / validate-schemas	16s
test_course_definition / identify_language_slugs	6s
test_course_definition / lint	1m 2s
test_course_definition / verify_templates_compiled	28s
test_course_definition / validate-stages-naming	9s
test_course_definition / test (cpp)	2m 13s
test_course_definition / test (csharp)	1m 33s
test_course_definition / test (rust)	1m 53s
test_course_definition / test (zig)	1m 57s
test_course_definition / test (java)	2m 34s
test_course_definition / test (gleam)	1m 19s
test_course_definition / test (elixir)	1m 27s
test_course_definition / test (clojure)	3m 21s
test_course_definition / test (javascript)	1m 5s
test_course_definition / test (kotlin)	5m 28s
test_course_definition / test (c)	2m 10s
test_course_definition / test (go)	2m 23s
test_course_definition / test (typescript)	1m 36s
test_course_definition / test (ruby)	1m 24s
test_course_definition / test (swift)	1m 33s
test_course_definition / test (python)	1m 13s
	35m 34s

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