Updates `.metadata.yml` with correct `.STL` file links and fixes stls.

printer_mods/ppak10/Enclosed_Z_Chain_Guide/.metadata.yml

@@ -23,8 +23,8 @@ images:
 - Images/render.png
 # List all STL files
 stl:
-- STL/Enclosed_Z_Chain_Guide_With_Logo.stl
-- STL/Enclosed_Z_Chain_Guide.stl
+- STL/Enclosed_Z_Chain_Guide_With_Logo.STL
+- STL/Enclosed_Z_Chain_Guide.STL
 # Printer compatibility. Please specify all compatible printers as a list. The following values are accepted:
 # "V0", "V0.1", "V0.2", "V0.2r1", "V1", "V1.6", "V1.8", "V1.8r1",  "V2", "V2.1", "V2.2", "V2.4", "V2.4r1", "V2.4r2", "VSW", "VT", "VTr1", "VL"
 # Please only specify printers that you have either tested your mod on yourself, or that someone else has tested for you. If you are unsure whether your