Clear the firefighter helmet brim from the brow

The face pass added a brow ridge; lift the helmet mesh 2 cm so the brim sits
above the eyes. Cap and hood were rendered on their characters and leave the
brow/ears and face readable. Rebuild and re-bake the helmet; Python 87/87.

assets/models/blender/manifest.json

@@ -287,12 +287,12 @@
       "bounds_godot": {
         "max": [
           0.26,
-          0.225,
+          0.245,
           0.26
         ],
         "min": [
           -0.26,
-          0.015,
+          0.035,
           -0.351
         ]
       },