Update the deprecations table

The tekton.dev/task label for ClusterTasks have been removed in
#2533, but the table
has not been updated yet, so doing it in here.

Signed-off-by: Andrea Frittoli <andrea.frittoli@uk.ibm.com>

docs/deprecations.md

@@ -19,7 +19,6 @@ being deprecated.
 
 | Feature Being Deprecated | Deprecation Announcement | [API Compatibility Policy](https://github.com/tektoncd/pipeline/tree/main/api_compatibility_policy.md) | Earliest Date or Release of Removal |
 | ------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------ | ----------------------------------- |
-| [`tekton.dev/task` label on ClusterTasks](https://github.com/tektoncd/pipeline/issues/2533) | [v0.12.0](https://github.com/tektoncd/pipeline/releases/tag/v0.12.0) | Beta | January 30 2021 |
 | [The `TaskRun.Status.ResourceResults.ResourceRef` field is deprecated and will be removed.](https://github.com/tektoncd/pipeline/issues/2694) | [v0.14.0](https://github.com/tektoncd/pipeline/releases/tag/v0.14.0) | Beta | April 30 2021 |
 | [The `PipelineRun.Spec.ServiceAccountNames` field is deprecated and will be removed.](https://github.com/tektoncd/pipeline/issues/2614) | [v0.15.0](https://github.com/tektoncd/pipeline/releases/tag/v0.15.0) | Beta | May 15 2021 |
 | [`Conditions` CRD is deprecated and will be removed. Use `when` expressions instead.](https://github.com/tektoncd/community/blob/main/teps/0007-conditions-beta.md) | [v0.16.0](https://github.com/tektoncd/pipeline/releases/tag/v0.16.0) | Alpha | Nov 02 2020 |