Fix checkboxes.

Author: bwsalmon

keps/sig-scheduling/5598-opportunistic-batching/README.md

@@ -142,17 +142,17 @@ checklist items _must_ be updated for the enhancement to be released.
 
 Items marked with (R) are required *prior to targeting to a milestone / release*.
 
-- [ X ] (R) Enhancement issue in release milestone, which links to KEP dir in [kubernetes/enhancements] (not the initial KEP PR)
+- [X] (R) Enhancement issue in release milestone, which links to KEP dir in [kubernetes/enhancements] (not the initial KEP PR)
 - [ ] (R) KEP approvers have approved the KEP status as `implementable`
-- [ X ] (R) Design details are appropriately documented
-- [ X ] (R) Test plan is in place, giving consideration to SIG Architecture and SIG Testing input (including test refactors)
+- [X] (R) Design details are appropriately documented
+- [X] (R) Test plan is in place, giving consideration to SIG Architecture and SIG Testing input (including test refactors)
   - [ ] e2e Tests for all Beta API Operations (endpoints)
-  - [ X ] (R) Ensure GA e2e tests meet requirements for [Conformance Tests](https://github.com/kubernetes/community/blob/master/contributors/devel/sig-architecture/conformance-tests.md)
+  - [X] (R) Ensure GA e2e tests meet requirements for [Conformance Tests](https://github.com/kubernetes/community/blob/master/contributors/devel/sig-architecture/conformance-tests.md)
   - [ ] (R) Minimum Two Week Window for GA e2e tests to prove flake free
-- [ X ] (R) Graduation criteria is in place
+- [X] (R) Graduation criteria is in place
   - [ ] (R) [all GA Endpoints](https://github.com/kubernetes/community/pull/1806) must be hit by [Conformance Tests](https://github.com/kubernetes/community/blob/master/contributors/devel/sig-architecture/conformance-tests.md) within one minor version of promotion to GA
-- [ X ] (R) Production readiness review completed
-- [ X ] (R) Production readiness review approved
+- [X] (R) Production readiness review completed
+- [X] (R) Production readiness review approved
 - [ ] "Implementation History" section is up-to-date for milestone
 - [ ] User-facing documentation has been created in [kubernetes/website], for publication to [kubernetes.io]
 - [ ] Supporting documentation—e.g., additional design documents, links to mailing list discussions/SIG meetings, relevant PRs/issues, release notes
@@ -320,7 +320,7 @@ when drafting this test plan.
 [testing-guidelines]: https://git.k8s.io/community/contributors/devel/sig-testing/testing.md
 -->
 
-[ X ] I/we understand the owners of the involved components may require updates to
+[X] I/we understand the owners of the involved components may require updates to
 existing tests to make this code solid enough prior to committing the changes necessary
 to implement this enhancement.