ci: uci/update-go (#45)

* chore: bump go.mod to Go 1.21 and run go fix

* chore: run go mod tidy

Author: web3-bot

go.mod

@@ -1,6 +1,6 @@
 module github.com/ipld/go-ipld-graphql
 
-go 1.20
+go 1.21
 
 require (
 	github.com/ipld/go-ipld-prime v0.12.4-0.20211019203807-9ddc75a0c4ae