GHA: Fix web gdextension build #211

Job	Run time
🧪 Unit tests	2m 54s
cache-env	1s
🍎 macOS / Editor (x86_64, release)	7m 12s
🔌 GDExtension / 🐧 Linux (x86_64, release)	54s
🍎 macOS / Editor (arm64, release)	7m 21s
🪟 Windows / Editor (x86_64, release)	8m 21s
🔌 GDExtension / 🐧 Linux (x86_64, debug)	1m 2s
🐧 Linux / Editor (x86_64, release)	10m 33s
🪟 Windows / Editor .NET (x86_64, release)	10m 20s
🔌 GDExtension / 🪟 Windows (x86_64, release)	1m 13s
🐧 Linux / Template (x86_64, release)	10m 13s
🔌 GDExtension / 🪟 Windows (x86_64, debug)	2m 14s
🔌 GDExtension / 🍎 macOS (universal, release)	1m 4s
🔌 GDExtension / 🍎 macOS (universal, debug)	1m 25s
🔌 GDExtension / 🌐 Web (wasm32, release)	9m 38s
🍎 macOS / Make macOS Bundles	1m 49s
	1h 16m 14s

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