Fix the description of the installBase directory
Fix the description of the installBase directory

Using Linux as example. The original wording may make people think the installBase directory is ~/.cache/bazel/_bazel_$USER/installfba9a2c87ee9589d72889caf082f1029, but in fact it is ~/.cache/bazel/_bazel_$USER/install/fba9a2c87ee9589d72889caf082f1029. The key is the ambiguity of the word "plus" in the original wording.

This conforms to the "Layout diagram" section in the same doc.

PiperOrigin-RevId: 454672388
Change-Id: I15b074fc498c889ad40266a81ee366cb87c93d14

katre/bazel,bazelbuild/bazel,bazelbuild/bazel,cushon/bazel,katre/bazel,cushon/bazel,bazelbuild/bazel,cushon/bazel,katre/bazel,cushon/bazel,katre/bazel,katre/bazel,katre/bazel,cushon/bazel,cushon/bazel,bazelbuild/bazel,bazelbuild/bazel,bazelbuild/bazel