Update to 5.13 uninteded changes

In 5.13, unintentionaly, we started treating lint input as JSON. To
avoid patch engine release, we are just adapting language-tools instead
of undoing the breaking change.

packages/language-server/src/lib/prisma-schema-wasm/lint.ts

@@ -18,7 +18,7 @@ export default function lint(text: string, onError?: (errorMessage: string) => v
       })
     }
 
-    const result = prismaSchemaWasm.lint(text)
+    const result = prismaSchemaWasm.lint(JSON.stringify(text))
 
     return JSON.parse(result) as LinterError[]
   } catch (e) {