Use Go's favorite version of the word "marshal".

Again, no idea why but this word has two commonly accepted spelling and Go code seems to very consistently use the one with one "l".

Signed-off-by: Matt Moyer <moyerm@vmware.com>

cmd/placeholder-name/main.go

@@ -53,7 +53,7 @@ func run(envGetter envGetter, tokenExchanger tokenExchanger, outputWriter io.Wri
 
 	err = json.NewEncoder(outputWriter).Encode(execCredential)
 	if err != nil {
-		return fmt.Errorf("failed to marshall response to stdout: %w", err)
+		return fmt.Errorf("failed to marshal response to stdout: %w", err)
 	}
 
 	return nil