fix: update favicon copy to use SVG format for consistency #32

Job	Run time
type + lowering conformance	23s
fmt + clippy	25s
SIMD contract (Cranelift)	16s
runtime smoke	18s
backend features (llvm-backend)	1m 19s
parse conformance	20s
backend features (default)	24s
	3m 25s

Provide feedback