Update tsconfig-paths.md (#5593)

Change string:string mapping in the docs to match the expected string:array[string] mapping. 

See: https://www.typescriptlang.org/tsconfig#paths

docs/guides/runtime/tsconfig-paths.md

@@ -8,8 +8,8 @@ Bun reads the `paths` field in your `tsconfig.json` to re-write import paths. Th
 {
   "compilerOptions": {
     "paths": {
-      "my-custom-name": "zod",
-      "@components/*": "./src/components/*"
+      "my-custom-name": ["zod"],
+      "@components/*": ["./src/components/*"]
     }
   }
 }