Add composer 2.3.8, remove composer 2.3.7
Add composer 2.3.8, remove composer 2.3.7

for stack(s) cflinuxfs3 [#182619460]

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