release_and_maintenance.rst: reflect that 2.16 is EOL (#2770)

* release_and_maintenance.rst: reflect that 2.16 is EOL

release_and_maintenance.rst: reflect that 2.16 is EOL

* update EOL date to july

---------

Co-authored-by: Sandra McCann <[email protected]>

Author: Andersson007

docs/docsite/rst/reference_appendices/release_and_maintenance.rst

@@ -194,7 +194,8 @@ Dates listed indicate the start date of the maintenance cycle.
      - | GA: 06 Nov 2023
        | Critical: 20 May 2024
        | Security: Nov 2024
-     - May 2025
+     - | **EOL**
+       | July 2025
      - | Python 3.10 - 3.12
      - | Python 2.7
        | Python 3.6 - 3.12