chore: update checkpoints in chain specifications (#2527)

Co-authored-by: CICD team <cicd-team@parity.io>

Author: ryanleecode

.changeset/proud-ducks-kiss.md

@@ -0,0 +1,7 @@
+---
+"@substrate/connect-known-chains": minor
+"@substrate/wallet-template": minor
+"@substrate/extension": minor
+---
+
+chore: update chainspecs