pkg(docker-cli): fix completion

[crazy-max]

follow-up:

• [master] deb,rpm: use cobra generated completions docker-ce-packaging#1150
• [master] deb,rpm: include dockerd man-page in docker-ce package docker-ce-packaging#1159

relates to https://github.com/docker/packaging/actions/runs/15518358500/job/43688270107#step:8:2253

 > [linux/amd64 builder-rpm 7/7] RUN --mount=type=bind,source=scripts/pkg-rpm-build.sh,target=/usr/local/bin/pkg-rpm-build     --mount=type=bind,from=common-scripts,source=gen-ver.sh,target=/usr/local/bin/gen-ver     --mount=type=bind,from=common-scripts,source=fix-cc.sh,target=/usr/local/bin/fix-cc     --mount=type=bind,from=src-tgz,source=/out/cli.tgz,target=/root/rpmbuild/SOURCES/cli.tgz     --mount=type=bind,from=src,source=/src,target=/usr/local/src/cli     --mount=type=bind,from=go,source=/usr/local/go,target=/usr/local/go     OUTDIR=/out SRCDIR=/usr/local/src/cli pkg-rpm-build:
66.29 + install -d /root/rpmbuild/BUILDROOT/docker-ce-cli-0.0.0~20250602110240~9e50654-3.el9.x86_64/usr/share/man/man5
66.29 + install -p -m 644 cli/man/man5/Dockerfile.5 cli/man/man5/docker-config-json.5 /root/rpmbuild/BUILDROOT/docker-ce-cli-0.0.0~20250602110240~9e50654-3.el9.x86_64/usr/share/man/man5
66.29 + install -d /root/rpmbuild/BUILDROOT/docker-ce-cli-0.0.0~20250602110240~9e50654-3.el9.x86_64/usr/share/man/man8
66.29 + install -p -m 644 'cli/man/man8/*.8' /root/rpmbuild/BUILDROOT/docker-ce-cli-0.0.0~20250602110240~9e50654-3.el9.x86_64/usr/share/man/man8
66.29 install: cannot stat 'cli/man/man8/*.8': No such file or directory