Give HIPS 1.75mm a unique GUID

It had the same GUID as Nylon 1.75mm.

Author: Ghostkeeper

generic_hips_175.xml.fdm_material

@@ -9,7 +9,7 @@ Generic HIPS 1.75mm profile. The data in this file may not be correct for your s
             <material>HIPS</material>
             <color>Generic</color>
         </name>
-        <GUID>283d439a-3490-4481-920c-c51d8cdecf9c</GUID>
+        <GUID>a468d86a-220c-47eb-99a5-bbb47e514eb0</GUID>
         <version>1</version>
         <color_code>#12f3e0</color_code>
     </metadata>