Update Breaking Changes doc for 2020-02-29 merge

docs/breaking_changes.md

@@ -10,16 +10,16 @@ The breaking change period is when we will merge PR's that change QMK in dangero
 
 ## When is the next Breaking Change?
 
-The next Breaking Change is scheduled for Nov 29.
+The next Breaking Change is scheduled for February 29, 2020.
 
 ### Important Dates
 
 * [x] 2019 Sep 21 - `future` is created. It will be rebased weekly.
-* [ ] 2019 Nov 01 - `future` closed to new PR's.
+* [ ] 2020 Jan 11 - `future` closed to new PR's.
-* [ ] 2019 Nov 01 - Call for testers.
+* [ ] 2020 Jan 11 - Call for testers.
-* [ ] 2019 Nov 27 - `master` is locked, no PR's merged.
+* [ ] 2020 Feb 26 - `master` is locked, no PR's merged.
-* [ ] 2019 Nov 29 - Merge `future` to `master`.
+* [ ] 2020 Feb 28 - Merge `future` to `master`.
-* [ ] 2019 Nov 30 - `master` is unlocked. PR's can be merged again.
+* [ ] 2020 Feb 29 - `master` is unlocked. PR's can be merged again.
 
 ## What changes will be included?
 
@@ -68,7 +68,7 @@ This happens immediately after the previous `future` branch is merged.
     * [ ] `git push origin future`
     * [ ] `git push --tags`
 
-## 4 Weeks Before Merge
+## 4+ Weeks Before Merge
 
 * `future` is now closed to new PR's, only fixes for current PR's may be merged
 * Post call for testers