Ignore errors from zap logger Sync (#2086)

Added golang CI lint
Reference issue: https://github.com/uber-go/zap/issues/880

Signed-off-by: Sanket Sudake <sanketsudake@gmail.com>

demos/declarative-specs/hello.go

@@ -6,7 +6,7 @@ import (
 )
 
 // Handler is the entry point for this fission function
-func Handler(w http.ResponseWriter, r *http.Request) { //nolint: deadcode
+func Handler(w http.ResponseWriter, r *http.Request) { //nolint:golint,unused,deadcode
 	msg := "Hello, CNCF Webinar!\n"
 	_, err := w.Write([]byte(msg))
 	if err != nil {