Fixed type in SPECULAR_SETUP keyword

ScriptableRenderPipeline/LightweightPipeline/Shaders/LightweightPassLit.cginc

 #endif
 
 #else // _METALLICSPECGLOSSMAP
-#if _SPECUALR_SETUP
+#if _SPECULAR_SETUP
     specGloss.rgb = _SpecColor.rgb;
 #else
     specGloss.rgb = _Metallic.rrr;