release helm-schema-gen to windows too

by default goreleaser only builds for linux and darwin

Author: karuppiah7890

.goreleaser.yml

@@ -1,10 +1,17 @@
 builds:
 - env:
   - CGO_ENABLED=0
+  goos:
+    - linux
+    - darwin
+    - windows
 archives:
 - replacements:
     darwin: Darwin
     linux: Linux
     windows: Windows
     386: i386
     amd64: x86_64
+  format_overrides:
+    - goos: windows
+      format: zip