Add ./ to package.json conditional export values (#3355)

Author: dsherret

packages/documentation/copy/en/release-notes/TypeScript 4.9.md

@@ -481,8 +481,8 @@ If this change impacts your library, you may need to add `types@` version select
       },
       "exports": {
           ".": {
-+             "types@<4.8": "4.8-types/main.d.ts",
-+             "types": "modern-types/main.d.ts",
++             "types@<4.8": "./4.8-types/main.d.ts",
++             "types": "./modern-types/main.d.ts",
               "import": "./dist/main.js"
           }
       }