[Docs] Fix path of /cas/ example in remote cache docs
[Docs] Fix path of /cas/ example in remote cache docs

The documentation uses http://localhost:8080/cache as the example remote cache URL. This fixes the `PUT` example to include the `/cache` root.

Closes #7987.

PiperOrigin-RevId: 244005058

bazelbuild/bazel,perezd/bazel,cushon/bazel,dslomov/bazel,meteorcloudy/bazel,twitter-forks/bazel,aehlig/bazel,meteorcloudy/bazel,katre/bazel,ulfjack/bazel,safarmer/bazel,twitter-forks/bazel,ulfjack/bazel,katre/bazel,akira-baruah/bazel,meteorcloudy/bazel,werkt/bazel,safarmer/bazel,safarmer/bazel,davidzchen/bazel,davidzchen/bazel,dslomov/bazel-windows,perezd/bazel,aehlig/bazel,akira-baruah/bazel,dslomov/bazel-windows,ButterflyNetwork/bazel,akira-baruah/bazel,dslomov/bazel-windows,bazelbuild/bazel,ulfjack/bazel,twitter-forks/bazel,perezd/bazel,safarmer/bazel,ulfjack/bazel,dslomov/bazel-windows,davidzchen/bazel,perezd/bazel,aehlig/bazel,dslomov/bazel,meteorcloudy/bazel,twitter-forks/bazel,ButterflyNetwork/bazel,ButterflyNetwork/bazel,aehlig/bazel,katre/bazel,davidzchen/bazel,safarmer/bazel,werkt/bazel,akira-baruah/bazel,cushon/bazel,cushon/bazel,perezd/bazel,meteorcloudy/bazel,bazelbuild/bazel,katre/bazel,dslomov/bazel,dslomov/bazel,safarmer/bazel,cushon/bazel,dslomov/bazel,ButterflyNetwork/bazel,bazelbuild/bazel,aehlig/bazel,werkt/bazel,aehlig/bazel,davidzchen/bazel,ulfjack/bazel,werkt/bazel,meteorcloudy/bazel,katre/bazel,perezd/bazel,ulfjack/bazel,twitter-forks/bazel,dslomov/bazel-windows,akira-baruah/bazel,cushon/bazel,davidzchen/bazel,meteorcloudy/bazel,werkt/bazel,ButterflyNetwork/bazel,aehlig/bazel,bazelbuild/bazel,ButterflyNetwork/bazel,dslomov/bazel,cushon/bazel,dslomov/bazel,akira-baruah/bazel,bazelbuild/bazel,katre/bazel,twitter-forks/bazel,dslomov/bazel-windows,perezd/bazel,davidzchen/bazel,werkt/bazel,ulfjack/bazel,twitter-forks/bazel