Add tenative July and August patch release dates

Signed-off-by: Jeremy Rickard <[email protected]>

Author: jeremyrickard

content/en/releases/patch-releases.md

@@ -80,6 +80,8 @@ releases may also occur in between these.
 | --------------------- | -------------------- | ----------- |
 | May 2023              | 2023-05-12           | 2023-05-17  |
 | June 2023             | 2023-06-09           | 2023-06-14  |
+| July 2023             | 2023-07-07           | 2023-07-12  |
+| August 2023           | 2023-08-04           | 2023-08-09  |
 
 ## Detailed Release History for Active Branches