Update v2_15_0.md

Signed-off-by: Jakub Balhar <jakub.balhar@broadcom.com>

docs/whats-new/release-notes/v2_15_0.md

@@ -13,7 +13,7 @@ Zowe Version 2.15.0 contains the enhancements that are described in the followin
 :::info find out more
 To watch a demo of new enhancements and updated features included in a Zowe minor release, look for the release demo recording in the [Zowe V2 System Demo playlist](https://www.youtube.com/playlist?list=PL8REpLGaY9QGjSTAqZaWxLG_g-jW1qGmo) on YouTube.
 
-System demos are typically held the week after a minor release becomes available. Check the [Open Mainframe Project Calendar](https://lists.openmainframeproject.org/g/zowe-dev/calendar) for the latest schedule.
+System demos are typically held the week after a minor release becomes available. Check the [Open Mainframe Project Calendar](https://zoom-lfx.platform.linuxfoundation.org/meetings/zowe) for the latest schedule.
 :::
 
 ### Zowe API Mediation Layer
@@ -145,4 +145,4 @@ The following security issues were fixed by the Zowe security group in version 2
 - BDSA-2023-3341
 - BDSA-2018-4022
 - CVE-2023-34055 (BDSA-2023-3275)
-- BDSA-2023-2481
+- BDSA-2023-2481