Bump the dependencies group with 4 updates

[dependabot]

Bumps the dependencies group with 4 updates: bazel_skylib, rules_java, rules_jvm_external and rules_shell.

Updates bazel_skylib from 1.8.1 to 1.8.2

Updates rules_java from 8.15.2 to 9.0.0

Updates rules_jvm_external from 6.8 to 6.9

Updates rules_shell from 0.6.0 to 0.6.1

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[cpovirk]

To update the lockfile, I ran something like this:

function repin() { cd $(mktemp -d) && git clone git@github.com:google/bazel-common.git && cd bazel-common && gh pr checkout $1 && REPIN=1 bazelisk run @google_bazel_common_maven//:pin && git commit -a -m 'Update lockfile.' && git push; }; repin 236

I'm going to approve the PR to do some testing, but I had already imported it manually and updated the lockfile separately, so I'll stick with my existing CL.

[cpovirk]

(I can see here that the CI now succeeds. I think we've seen cases in which Copybara skips running CI again during imports, so that may be another reason to prefer making the fix on the GitHub side before importing. Or maybe the CI would still run as long as Copybara knew that the CL had been changed from the original? I'm not sure. Anyway, I have changes in flight that will allow us to fix in GitHub and import afterward in the future.)

[dependabot]

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