Add a security.txt (#44487)

* added security.txt

Signed-off-by: GitHub <[email protected]>

* removed pgp

Signed-off-by: coder12git <[email protected]>

* Update expiry date

* Update canonical url

Co-authored-by: Tabitha Sable <[email protected]>

---------

Signed-off-by: GitHub <[email protected]>
Signed-off-by: coder12git <[email protected]>
Co-authored-by: Tabitha Sable <[email protected]>

Author: coder12git

.well-known/security.txt

@@ -0,0 +1,5 @@
+Contact: mailto:[email protected]
+Expires: 2031-01-11T06:30:00.000Z
+Preferred-Languages: en
+Canonical: https://kubernetes.io/.well-known/security.txt 
+Policy: https://github.com/kubernetes/website/blob/main/SECURITY.md