Fix description of MetalRT option

Descriptions should not end with a full-stop.

Pull Request: https://projects.blender.org/blender/blender/pulls/114267

intern/cycles/blender/addon/properties.py

@@ -1475,7 +1475,7 @@ class CyclesPreferences(bpy.types.AddonPreferences):
     metalrt: EnumProperty(
         name="MetalRT",
         description="MetalRT for ray tracing uses less memory for scenes which use curves extensively, and can give better "
-                    "performance in specific cases.",
+                    "performance in specific cases",
         default='AUTO',
         items=(
             ('OFF', "Off", "Disable MetalRT (uses BVH2 layout for intersection queries)"),