Use backtick to format references to file names in `working-with-the-…

…npm-registry` (#35765)

Co-authored-by: Alex Nguyen <[email protected]>

data/reusables/package_registry/verify_repository_field.md

@@ -1 +1 @@
-1. Verify the `repository` field in your project's _package.json_. The `repository` field must match the URL for your {% data variables.product.prodname_dotcom %} repository. For example, if your repository URL is `github.com/my-org/test` then the repository field should be `https://github.com/my-org/test.git`.
+1. Verify the `repository` field in your project's `package.json`. The `repository` field must match the URL for your {% data variables.product.prodname_dotcom %} repository. For example, if your repository URL is `github.com/my-org/test` then the repository field should be `https://github.com/my-org/test.git`.