fix(netlify): vendor dir is no longer used

Signed-off-by: Rajat Jindal <rajatjindal83@gmail.com>

Makefile

@@ -2,6 +2,6 @@
 
 lambda:
 	mkdir -p functions
-	CGO_ENABLED=0 GOOS=linux go build -mod vendor --ldflags "-s -w" -o functions/github-action-webhook cmd/webhook/main.go
+	CGO_ENABLED=0 GOOS=linux go build --ldflags "-s -w" -o functions/github-action-webhook cmd/webhook/main.go
 
 all: lambda