fix: after remove cannot build release

After changing org the main.go was also moved to the repo root and this
broke the release process as it was looking for the main.go in `cmd/fl`.

Signed-off-by: Richard Case <richard@weave.works>

Author: richardcase

.goreleaser.yaml

@@ -5,7 +5,7 @@ before:
 builds:
   - env:
       - CGO_ENABLED=0
-    main: ./cmd/fl
+    main: .
     goos:
       - linux
       - darwin