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
```