Fix indentation issue in Arduino build middleware

Author: Jason2866

builder/frameworks/arduino.py

@@ -938,7 +938,7 @@ def get_frameworks_in_current_env():
     if IS_WINDOWS:
         if not env.get("__PIO_BUILD_MIDDLEWARES"):
             env["__PIO_BUILD_MIDDLEWARES"] = []
-            env["__PIO_BUILD_MIDDLEWARES"].append(env.AddBuildMiddleware(smart_include_length_shorten))
+        env["__PIO_BUILD_MIDDLEWARES"].append(env.AddBuildMiddleware(smart_include_length_shorten))
 
     build_script_path = str(Path(FRAMEWORK_DIR) / "tools" / "pioarduino-build.py")
     SConscript(build_script_path)