Automatic merge from submit-queue (batch tested with PRs 52556, 52897, 54342). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Fix broken links in api after moving proposals to subdirs

**What this PR does / why we need it**:
fix incorrect links in api after kubernetes/community#1010

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes  kubernetes/community#918

**Special notes for your reviewer**:
CC @bgrant0607
**Release note**:

```
NONE
```