Fix CI to NOT run publish on every pull request #2734

Job	Run time
minimal	15s
msrv	49s
docs	25s
check-cfg	19s
quickchecking	14s
rustfmt-clippy	27s
test (ubuntu-latest, 9.0, 0, 0, 0, 0)	1m 39s
test-book	5s
test (ubuntu-latest, 9.0, 0, 0, 1, 0)	1m 56s
test-expectations (ubuntu-latest)	42s
test-no-headers	34s
test (ubuntu-latest, 9.0, 0, 1, 0, 0)	1m 38s
test-expectations (macos-latest)	38s
test (ubuntu-latest, 9.0, 0, 1, 1, 0)	1m 40s
test (ubuntu-latest, 9.0, 1, 0, 0, 0)	2m 15s
test (ubuntu-latest, 9.0, 1, 0, 1, 0)	2m 30s
test (ubuntu-latest, 9.0, 1, 1, 0, 0)	2m 3s
test (ubuntu-latest, 9.0, 1, 1, 1, 0)	2m 14s
test (ubuntu-latest, 16.0, 0, 0, 0, 0)	4m 9s
test (ubuntu-latest, 16.0, 0, 0, 1, 0)	4m 5s
test (ubuntu-latest, 16.0, 0, 1, 0, 0)	4m 12s
test (ubuntu-latest, 16.0, 0, 1, 1, 0)	4m 29s
test (ubuntu-latest, 16.0, 1, 0, 0, 0)	5m 6s
test (ubuntu-latest, 16.0, 1, 0, 1, 0)	4m 59s
test (ubuntu-latest, 16.0, 1, 1, 0, 0)	5m 10s
test (ubuntu-latest, 16.0, 1, 1, 1, 0)	4m 41s
test (ubuntu-latest, 16.0, 0, 0, 1)	2m 21s
test (macos-latest, 16.0, 0, 0, 0)	2m 10s
success	1s
	1h 1m 46s

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