Add node 18.7.0, remove node 18.6.0
Add node 18.7.0, remove node 18.6.0

for stack(s) cflinuxfs3, cflinuxfs4 [#182823610]

cloudfoundry/nodejs-buildpack,cloudfoundry/nodejs-buildpack,cloudfoundry/nodejs-buildpack,cloudfoundry/nodejs-buildpack