Update Release Documentation (#3884)

Signed-off-by: Prudhvi Godithi <[email protected]>

.github/ISSUE_TEMPLATE/release_template.md

@@ -32,7 +32,7 @@ Please refer to the following link for the release version dates: [Release Sched
 - [ ] [Component Release Issue](https://github.com/opensearch-project/opensearch-build/blob/main/RELEASE_PROCESS_OPENSEARCH.md#component-release-issue).
 - [ ] [Release Campaigns](https://github.com/opensearch-project/opensearch-build/blob/main/RELEASE_PROCESS_OPENSEARCH.md#release-campaigns).
 
-### [Release Branch and Version Increment](https://github.com/opensearch-project/opensearch-build/blob/main/RELEASE_PROCESS_OPENSEARCH.md#release-branch-readiness) - _Ends __REPLACE_RELEASE-minus-14-days__
+### [Release Branch and Version Increment](https://github.com/opensearch-project/opensearch-build/blob/main/RELEASE_PROCESS_OPENSEARCH.md#release-branch-readiness) - _Ends __REPLACE_RELEASE-minus-4-days__
 
 - [ ] [Core Release Branch](https://github.com/opensearch-project/opensearch-build/blob/main/RELEASE_PROCESS_OPENSEARCH.md#core).
 - [ ] [Core Version Increment](https://github.com/opensearch-project/opensearch-build/blob/main/RELEASE_PROCESS_OPENSEARCH.md#core-version-increment).

RELEASE_PROCESS_OPENSEARCH.md

@@ -215,11 +215,11 @@ If exists any release specific issues/campaigns link it back to the release issu
 
 ## Release Branch Readiness
 
-The `Release Branch Readiness date` is determined as the release date minus 14 days.
+The `Release Branch Readiness date` is determined as the release date minus 4 days.
 
 ### Release Branch
 
-Not applicable for patch release.
+This release branch creation is not applicable for patch release.
 
 #### Core