cmd/tailscale: fix typo in error message
@@ -510,7 +510,7 @@ func updateMaskedPrefsFromUpFlag(mp *ipn.MaskedPrefs, flagName string) {
const accidentalUpPrefix = "Error: changing settings via 'tailscale up' requires mentioning all\n" +
"non-default flags. To proceed, either re-run your command with --reset or\n" +
- "specify use the command below to explicitly mention the current value of\n" +
+ "use the command below to explicitly mention the current value of\n" +
"all non-default settings:\n\n" +
"\ttailscale up"
