Merge pull request #53071 from tpepper/trivial

Automatic merge from submit-queue. 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 cloud provider info urls

kubernetes/community repo's commit 3034683c5997474d9f59ef722c8ee9c1f1e58f07
started a re-org of the design-proposals directory to have hierarchical
structure and subdirectories.  This in turn broke the urls in the
kubernetes/kubernetes/pkg/cloud-provider/README.md file.  This patch adds
the appropriate subdirectories into the urls in the readme.

Signed-off-by: Tim Pepper <tpepper@vmware.com>

```release-note
NONE
```

pkg/cloudprovider/README.md

@@ -4,7 +4,7 @@
 The mechanism for supporting cloud providers is currently in transition:  the original method of implementing cloud provider-specific functionality within the main kubernetes tree (here) is no longer advised; however, the proposed solution is still in development.
 
 #### Guidance for potential cloud providers: 
-* Support for cloud providers is currently in a state of flux. Background information on motivation and the proposal for improving is in the github [proposal](https://git.k8s.io/community/contributors/design-proposals/cloud-provider-refactoring.md). 
+* Support for cloud providers is currently in a state of flux. Background information on motivation and the proposal for improving is in the github [proposal](https://git.k8s.io/community/contributors/design-proposals/cloud-provider/cloud-provider-refactoring.md). 
 * In support of this plan, a new cloud-controller-manager binary was added in 1.6. This was the first of several steps (see the proposal for more information). 
 * Attempts to contribute new cloud providers or (to a lesser extent) persistent volumes to the core repo will likely meet with some pushback from reviewers/approvers. 
 * It is understood that this is an unfortunate situation in which 'the old way is no longer supported but the new way is not ready yet', but the initial path is unsustainable, and contributors are encouraged to participate in the implementation of the proposed long-term solution, as there is risk that PRs for new cloud providers here will not be approved. 
@@ -13,4 +13,4 @@ The mechanism for supporting cloud providers is currently in transition:  the or
 #### Some additional context on status / direction: 
 * 1.6 added a new cloud-controller-manager binary that may be used for testing the new out-of-core cloudprovider flow.
 * Setting cloud-provider=external allows for creation of a separate controller-manager binary
-* 1.7 adds [extensible admission control](https://git.k8s.io/community/contributors/design-proposals/admission_control_extension.md), further enabling topology customization. 
+* 1.7 adds [extensible admission control](https://git.k8s.io/community/contributors/design-proposals/api-machinery/admission_control_extension.md), further enabling topology customization.