[Tests] override attw's typescript to the root version to fix bun npm ls

`@arethetypeswrong/core` hard-pins `typescript@5.6.1-rc`.
Under bun, the single hoisted `typescript@next` (now a 6.0.0-dev nightly) is shared with attw,
so the post-install `npm ls` flags it as invalid and every `bun i` matrix job fails.
Pinning attw's `typescript` to `$typescript` dedupes both onto the root version,
which `npm ls` accepts.

Upstream: arethetypeswrong/arethetypeswrong.github.io#254

Author: ljharb

package.json

@@ -112,6 +112,11 @@
 			"android-browser/4.2"
 		]
 	},
+	"overrides": {
+		"@arethetypeswrong/core": {
+			"typescript": "$typescript"
+		}
+	},
 	"engines": {
 		"node": ">= 0.4"
 	},