Add further clarification about execution group inheritance.
Add further clarification about execution group inheritance.

PiperOrigin-RevId: 373425680

meteorcloudy/bazel,ButterflyNetwork/bazel,katre/bazel,ButterflyNetwork/bazel,ButterflyNetwork/bazel,perezd/bazel,cushon/bazel,perezd/bazel,bazelbuild/bazel,cushon/bazel,bazelbuild/bazel,cushon/bazel,perezd/bazel,meteorcloudy/bazel,cushon/bazel,bazelbuild/bazel,meteorcloudy/bazel,ButterflyNetwork/bazel,katre/bazel,perezd/bazel,bazelbuild/bazel,katre/bazel,perezd/bazel,cushon/bazel,meteorcloudy/bazel,katre/bazel,perezd/bazel,ButterflyNetwork/bazel,meteorcloudy/bazel,katre/bazel,katre/bazel,cushon/bazel,bazelbuild/bazel,bazelbuild/bazel,meteorcloudy/bazel,meteorcloudy/bazel,ButterflyNetwork/bazel,perezd/bazel