Automatic merge from submit-queue
Update the label manifest with new milestone labels
**What this PR does / why we need it**:
Make the milestone labels more noticeable.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
ref: #51663
**Special notes for your reviewer**:
/cc @bgrant0607 @fejta
/assign @grodrigues3 @spxtr
**Release note**:
```release-note
NONE
```