Fix wrong dates in v2022.4 release schedule

Fix wrong dates in the release scheduled for v2022.4 based on the published
schedule available in release/_index.md

Signed-off-by: Walter Lozano <walter.lozano@collabora.com>

content/release/v2022.4/release_schedule.md

@@ -13,8 +13,8 @@ The v2022.4 release cycle is scheduled to start in January 2023.
 | Soft feature freeze: end of feature proposal and review period                                           | 2023-02-01        |
 | Soft code freeze/hard feature freeze: end of feature development for this release, only bugfixes allowed | 2023-02-08        |
 | Release candidate 1 (RC1)/hard code freeze: no new code changes may be made after this date              | 2023-02-15        |
-| RC testing                                                                                               | 2022-11-17..11-30 |
-| v2022.4 release                                                                                          | 2022-03-02        |
+| RC testing                                                                                               | 2023-02-16..03-01 |
+| v2022.4 release                                                                                          | 2023-03-02        |
 
 If the release candidate 1 does not successfully pass all required
 tests, then the issues will be fixed and a new release candidate will be