Add nginx 1.19.4, remove nginx 1.19.3
Add nginx 1.19.4, remove nginx 1.19.3

for stack(s) cflinuxfs3 [#175461734]

cloudfoundry/php-buildpack,cloudfoundry/php-buildpack,cloudfoundry/php-buildpack,cloudfoundry/php-buildpack,cloudfoundry/php-buildpack,cloudfoundry/php-buildpack,cloudfoundry/php-buildpack