Add release dates for May and June

Signed-off-by: Marko Mudrinić <[email protected]>

Author: xmudrii

content/en/releases/patch-releases.md

@@ -78,9 +78,10 @@ releases may also occur in between these.
 
 | Monthly Patch Release | Cherry Pick Deadline | Target date |
 | --------------------- | -------------------- | ----------- |
-| February 2023         | 2023-02-10           | 2023-02-15  |
 | March 2023            | 2023-03-10           | 2023-03-15  |
 | April 2023            | 2023-04-07           | 2023-04-12  |
+| May 2023              | 2023-05-12           | 2023-05-17  |
+| June 2023             | 2023-06-09           | 2023-06-14  |
 
 ## Detailed Release History for Active Branches