fix go-generate command in goreleaser config (#1085)

golang/go#60079 changed the behavior of
go-generate when the target package does not exist. It used to silently
succeeed, now it errors. The schema package was removed in 2021.

.goreleaser.yml

@@ -10,7 +10,7 @@ before:
   hooks:
     - go mod download
     - go mod tidy
-    - go generate ./schema
+    - go generate ./...
 builds:
 -
   main: ./cmd/src/