Fix Markdown links

Author: Jberlinsky

README.md

@@ -209,13 +209,13 @@ The project has the following folders and files:
 
 ## Submodules
 
-To more cleanly handle cases where desired functionality would require complex duplication of Terraform resources (i.e. [PR 51](https://github.com/terraform-google-modules/terraform-google-kubernetes-engine/pull/51)), this repository is divided into multiple submodules. To ensure backwards compatibility with the module before this change, using the root of the repository as the source of a module will default to the [./modules/public-cluster](`public-cluster`) submodule.
+To more cleanly handle cases where desired functionality would require complex duplication of Terraform resources (i.e. [PR 51](https://github.com/terraform-google-modules/terraform-google-kubernetes-engine/pull/51)), this repository is divided into multiple submodules. To ensure backwards compatibility with the module before this change, using the root of the repository as the source of a module will default to the [`public-cluster`](./modules/public-cluster) submodule.
 
 The following submodules currently exist:
 
-- [./modules/public-cluster](`public-cluster`), which creates a GKE cluster with its nodes and endpoint publicly accessible.
+- [`public-cluster`](./modules/public-cluster), which creates a GKE cluster with its nodes and endpoint publicly accessible.
 
-Submodules, and the reverse-compatible wrapper for the root of the repository, are generated by running `make generate`. When making changes to this repository, please ensure that your change is made in the [./autogen](`autogen`) directory if it is expected to propagate to all submodules.
+Submodules, and the reverse-compatible wrapper for the root of the repository, are generated by running `make generate`. When making changes to this repository, please ensure that your change is made in the [`autogen`](./autogen) directory if it is expected to propagate to all submodules.
 
 ## Testing