Postpone the release of cert-manager 1.18

Signed-off-by: Richard Wall <[email protected]>

Author: wallrj-cyberark

content/docs/releases/README.md

@@ -28,7 +28,7 @@ should be stable enough to run.
 
 | Release  | Release Date | End of Life     | [Supported Kubernetes / OpenShift Versions][s] | [Tested Kubernetes Versions][test] |
 |:--------:|:------------:|:---------------:|:----------------------------------------------:|:----------------------------------:|
-| [1.18][] | Jun 04, 2025 | Release of 1.20 | 1.29 → 1.33 / 4.16 → 4.17                      | 1.30 → 1.33                        |
+| [1.18][] | Jun 10, 2025 | Release of 1.20 | 1.29 → 1.33 / 4.16 → 4.17                      | 1.30 → 1.33                        |
 
 Dates in the future are not firm commitments and are subject to change.