docs(cosmic-swingset): update NEWS

Agoric · Dec 10, 2020 · 3e7d676 · 3e7d676
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diff --git a/packages/cosmic-swingset/NEWS.md b/packages/cosmic-swingset/NEWS.md
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 User-visible changes in Cosmic SwingSet:
 
+## Release 0.24.0 (2020-12-10)
+
+* Upgrade to Cosmos SDK v0.40.0-rc4 (Stargate).
+
+### BREAKING CHANGES
+
+* The default block time (`commit_timeout`) has changed from `"2s"` back to
+  `"5s"`, in the interest of ensuring globally-dispersed validators can
+  participate without downtime.
+
 ## Release 0.21.2 (2020-10-11)
 
 * Upgrade to Cosmos SDK v0.40.0 (Stargate) prerelease branch with local changes