force display 0xE0073 as a replacement character

[qxdFox]

I've recently come across a player that visually had no name, did some digging and found out 0xE0073 does not seem to get rendered with Noto Emoji as fallback, this forces that character to be rendered as a replacement character

• Tested the change ingame
• Provided screenshots if it is a visual change
• Tested in combination with possibly related configuration options
• Written a unit test (especially base/) or added coverage to integration test
• Considered possible null pointers and out of bounds array indexing
• Changed no physics that affect existing maps
• Tested the change with ASan+UBSan or valgrind's memcheck (optional)
• I didn't use generative AI to generate more than single-line completions