Maint 853 update baner with new townhall link (#857) #2172

Job	Run time
build_neurostore	28s
build_neurosynth_compose	1m 26s
clean (neurosynth_compose)	2s
clean (compose_nginx)	2s
style_check	9s
clean (compose_pgsql)	3s
clean (compose_worker)	5s
clean (neurostore)	3s
clean (store_nginx)	2s
clean (store_pgsql)	5s
neurostore_backend_tests	2m 59s
neurosynth_compose_backend_tests	2m 8s
neurosynth_compose_JUNIT_tests	3m 22s
neurosynth_compose_cypress_tests	6m 49s
	17m 43s

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