Update references to `master` branch #455

Job	Run time
analyze	35s
collect-release-info	8s
collect-docsite-release-info	5s
unpublish_docsite	0s
build-docsite	2m 47s
test (3.0, rails_6_1, rspec_lt_3_10)	2m 15s
test (3.0, rails_6_1, rspec_gte_3_10)	2m 5s
test (3.0, rails_7_0, rspec_lt_3_10)	2m 0s
test (3.0, rails_7_0, rspec_gte_3_10)	2m 2s
test (3.0, no_rails, rspec_lt_3_10)	1m 40s
test (3.0, no_rails, rspec_gte_3_10)	1m 40s
test (3.1, rails_6_1, rspec_lt_3_10)	2m 6s
test (3.1, rails_6_1, rspec_gte_3_10)	2m 6s
test (3.1, rails_7_0, rspec_lt_3_10)	2m 5s
test (3.1, rails_7_0, rspec_gte_3_10)	2m 6s
test (3.1, no_rails, rspec_lt_3_10)	1m 38s
test (3.1, no_rails, rspec_gte_3_10)	1m 42s
test (3.2, rails_6_1, rspec_lt_3_10)	2m 11s
test (3.2, rails_6_1, rspec_gte_3_10)	2m 8s
test (3.2, rails_7_0, rspec_lt_3_10)	2m 6s
test (3.2, rails_7_0, rspec_gte_3_10)	2m 1s
test (3.2, no_rails, rspec_lt_3_10)	1m 31s
test (3.2, no_rails, rspec_gte_3_10)	1m 35s
test (3.3, rails_6_1, rspec_lt_3_10)	2m 17s
test (3.3, rails_6_1, rspec_gte_3_10)	2m 11s
test (3.3, rails_7_0, rspec_lt_3_10)	2m 14s
test (3.3, rails_7_0, rspec_gte_3_10)	2m 10s
test (3.3, no_rails, rspec_lt_3_10)	1m 36s
test (3.3, no_rails, rspec_gte_3_10)	1m 40s
ready-to-merge	1s
publish-docsite	4s
	50m 45s

Provide feedback