upgrade fission to 1.21.0

Author: sophiebsw

apps/versions.toml

@@ -37,7 +37,7 @@ version = "1.43.1"
 helm = "https://coredns.github.io/helm"
 
 [fission]
-version = "1.20.1"
+version = "1.21.0"
 helm = "https://fission.github.io/fission-charts/"
 chart = "fission-all"