Bump github.com/stretchr/testify from 1.8.2 to 1.9.0 in /extension/zpagesextension #1372

Job	Run time
setup-environment	28s
checks	37s
unittest (1.20)	1m 7s
unittest (1.19)	48s
lint	1m 12s
cross-build-collector (darwin, amd64)	18s
test-coverage	1m 18s
cross-build-collector (darwin, arm64)	22s
cross-build-collector (linux, 386)	32s
cross-build-collector (linux, amd64)	22s
cross-build-collector (linux, arm64)	18s
cross-build-collector (linux, ppc64le)	19s
cross-build-collector (linux, arm)	28s
cross-build-collector (windows, 386)	20s
cross-build-collector (windows, amd64)	28s
	8m 57s

Provide feedback