(DOCSP-31558) Updates end of life policy and date (#1418)

* (DOCSP-31558) Updates end of life policy and date

* Includes change from copy review

Author: sarahsimpers

source/reference/support-lifecycle.txt

@@ -12,11 +12,13 @@ Support Lifecycle
    :depth: 1
    :class: singlecol
 
-The support lifecycle of the |k8s-op| is, by default, 9 months x 31
-days each month (279 days total) from the release date of a major
-version. Versioning of the |k8s-op-short| does not follow semantic
+Starting in version 1.20, the support lifecycle of the |k8s-op| is one
+year from the release date of a major version. Prior to version 1.20,
+the support lifecycle was 9 months x 31 days each month (279 days total)
+from the release date of a major version. Versioning of the 
+|k8s-op-short| does not follow semantic
 versioning convention, and a major version of the |k8s-op-short| is 
-X.X. (for example, 1.17 or 1.18). The following dates might be subject
+X.X (for example, 1.17 or 1.18). The following dates might be subject
 to change.
 
 .. list-table::
@@ -27,7 +29,7 @@ to change.
      - End of Life Date
 
    * - 1.20.x
-     - 2024-03-12
+     - 2024-06-07
 
    * - 1.19.x
      - 2024-01-03