Reference community repo for release schedule (#387)

Remove duplicated release schedule from README and link to the
canonical release schedule in knative/community instead.

Changes:
- Replace release schedule section with link to community repo
- Update release checklist to remove README update step

Signed-off-by: Vincent Link <[email protected]>

Author: linkvt

.github/ISSUE_TEMPLATE/release-checklist.md

@@ -307,7 +307,7 @@ Notes
 
 - [ ] Update the supported version(s) of Serving/Eventing in the [operator page in the Knative docs](https://github.com/knative/docs/blob/main/docs/versioned/install/operator/knative-with-operators.md)
 - [ ] Release the knative.dev/docs (see [procedure](https://github.com/knative/release/blob/main/PROCEDURES.md#releasing-a-new-version-of-the-knative-documentation))
-- [ ] Release schedule has been updated in [RELEASE-SCHEDULE.md](https://github.com/knative/community/blob/main/mechanics/RELEASE-SCHEDULE.md) and [README.md](https://github.com/knative/release/blob/main/README.md)
+- [ ] Release schedule has been updated in [RELEASE-SCHEDULE.md](https://github.com/knative/community/blob/main/mechanics/RELEASE-SCHEDULE.md)
 - [ ] Collect release notes into the blog post and publish it (see [procedure](https://github.com/knative/release/blob/main/PROCEDURES.md#updating-the-release-schedule))
 - [ ] Knobots update-deps job has been bumped to the next release version (see [procedure](https://github.com/knative/release/blob/main/PROCEDURES.md#bump-dependencies-in-auto-update-job))
 - [ ] An announcement was made in the [**#knative**](https://app.slack.com/client/T08PSQ7BQ/C04LGHDR9K7) Slack channels that the new Knative release is out

README.md

@@ -4,22 +4,7 @@ This project is for Knative release leads who need to track and perform a series
 
 ## Release schedule
 
-The Knative project releases quarterly, on Tuesday of the 4th week of January, April, July, October, represented by the following Crontab expression:
-
-```
-# minute   hour   day      month        weekday
-0          0      22-28    1,4,7,10     2
-```
-
-**NOTE**: *Minor deviances from above schedule are possible, but they must be accepted by the [TOC committee](https://github.com/knative/community/blob/main/TECH-OVERSIGHT-COMMITTEE.md). Exact dates will always be updated in table(s) below.*
-
-### Release schedule for 2026
-
-| Release | Release Date | Release Leads                                                     | PKG cut    | Unpin repos |
-|---------|--------------|-------------------------------------------------------------------|------------|-------------|
-| v1.21   | 2026-01-20   | TBD                                                               | 2026-01-13 | 2026-01-27  |
-| v1.22   | 2026-04-21   | TBD                                                               | 2026-04-14 | 2026-04-28  |
-| v1.23   | 2026-07-28   | TBD                                                               | 2026-07-21 | 2026-08-04  |
+See the [Release Schedule](https://github.com/knative/community/blob/main/mechanics/RELEASE-SCHEDULE.md) in the community repo.
 
 ## Release leads
 The current pool of Knative release lead volunteers are listed in the [release roster](./ROSTER.md). If you would like to be a Knative release lead, please open a PR to add your name to the list! Please note: Before volunteering to lead a specific release, please look over the [release timeline](TIMELINE.md) to ensure your availability during the various checkpoints for that release is going to be a match.