Fix broken symlink in `WebAssemblyRecipe.swift` #75

Job	Run time
Test / macOS (Xcode ${{ matrix.xcode_version }} - ${{ matrix.os_version }} - ${{ matrix.arch }})	0s
Test / Windows (${{ matrix.swift_version }} - ${{ ((inputs.enable_windows_docker && contains(matrix.swift_version, 'nightly') && 'windows-2019') \|\| 'windows-2022') }})	0s
Test / Linux (5.9 - jammy)	3m 9s
Test / Linux (5.10 - jammy)	3m 12s
Test / Linux (6.0 - jammy)	3m 26s
Test / Linux (6.1 - jammy)	3m 24s
Test / Linux (nightly-main - jammy)	4m 12s
Test / Linux (nightly-6.1 - jammy)	4m 14s
Test / Linux (nightly-6.2 - jammy)	4m 14s
Soundness / Broken symlinks check	6s
Soundness / API breakage check	0s
Soundness / Documentation check	32s
Soundness / Format check	31s
Soundness / Python lint check	5s
Soundness / License headers check	4s
Soundness / Shell check	34s
Soundness / Unacceptable language check	5s
Soundness / YAML lint check	5s
	27m 53s

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