ci: fix makefile docker ownership

[gdvalle]

Fix the docker user flag to properly fetch group and user IDs.

Without this, on linux with GNU Make 4, a new registry component will end up throwing an error:

[error] Unable to write file "docs/attributes-registry/csi.md":

because it writes out as root rather than the current user.

[lmolkova]

it seems to break policy check :(

docker run --rm \
	-u 1001:127 \
	--mount 'type=bind,source=/home/runner/work/semantic-conventions/semantic-conventions/policies,target=/home/weaver/policies,readonly' \
	--mount 'type=bind,source=/home/runner/work/semantic-conventions/semantic-conventions/model,target=/home/weaver/source,readonly' \
	otel/weaver:v0.9.1 registry check \
	--registry=/home/weaver/source \
	--baseline-registry=https://github.com/open-telemetry/semantic-conventions/archive/refs/tags/v1.27.0.zip[model] \
	--policy=/home/weaver/policies
....

  × Cache directory not created: Permission denied (os error [13](https://github.com/open-telemetry/semantic-conventions/actions/runs/10708326730/job/29690368799?pr=1386#step:3:14))

[gdvalle]

it seems to break policy check :(

Doh. I don't think we need it here anyway, it's just a read-only mount, and unless we have world read off (not so common) this should work fine. Seems the weaver container is running under its own UID/GID.

Removed in 33d0431