Fix typo in RELEASE_NOTES.md

Co-authored-by: daniel-zullo-frequenz <[email protected]>
Signed-off-by: Sahas Subramanian <[email protected]>

Author: shsms

RELEASE_NOTES.md

@@ -8,7 +8,7 @@
 
 - The SDK is now using the microgrid API client from [`frequenz-client-microgrid`](https://github.com/frequenz-floss/frequenz-client-microgrid-python/). You should update your code if you are using the microgrid API client directly.
 
-- The minimum required `frequenz-channels` version is not [`v1.0.0-rc1`](https://github.com/frequenz-floss/frequenz-channels-python/releases/tag/v1.0.0-rc.1).
+- The minimum required `frequenz-channels` version is now [`v1.0.0-rc1`](https://github.com/frequenz-floss/frequenz-channels-python/releases/tag/v1.0.0-rc.1).
 
 ## New Features