docs: Fix WG Serving weekly meeting formatting

[terrytangyuan]

cc @SergeyKanzhelev @ArangoGutierrez

Currently this is rendered incorrectly:

This PR fixes that.

[terrytangyuan]

Could you squash the commits, otherwise looks good

Done. Will need approval again @SergeyKanzhelev @ArangoGutierrez

[ArangoGutierrez]

/assign pohly

[terrytangyuan]

Resolved conflicts.

[terrytangyuan]

/assign @pohly

[SergeyKanzhelev]

/lgtm

[pohly]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ArangoGutierrez, pohly, SergeyKanzhelev, terrytangyuan

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