Rename bokutachiIR to TachiIR

server/src/server/router/ir/beatoraja/auth.ts

@@ -6,7 +6,7 @@ export const ValidateIRClientVersion: RequestHandler = (req, res, next) => {
 	if (header !== "2.0.0") {
 		return res.status(400).json({
 			success: false,
-			description: "Invalid BokutachiIR client version.",
+			description: "Invalid TachiIR client version.",
 		});
 	}