fix(git-clone): Update README.md (#448)

Changes `coder_git_auth` to `coder_external_auth` in README

## Description

<!-- Briefly describe what this PR does and why -->

## Type of Change

- [ ] New module
- [ ] Bug fix
- [ ] Feature/enhancement
- [X] Documentation
- [ ] Other

## Module Information

<!-- Delete this section if not applicable -->

**Path:** `registry/coder/modules/git-clone` 
**New version:** `v1.1.2`  
**Breaking change:** [ ] Yes [X] No

## Testing & Validation

- [ ] Tests pass (`bun test`)
- [ ] Code formatted (`bun run fmt`)
- [ ] Changes tested locally

## Related Issues

<!-- Link related issues or write "None" if not applicable -->

---------

Co-authored-by: Jullian Pepito <jullian@MacBook-Pro.local>
Co-authored-by: DevCats <christofer@coder.com>

Author: 3 people

registry/coder/modules/git-clone/README.md

@@ -14,7 +14,7 @@ This module allows you to automatically clone a repository by URL and skip if it
 module "git-clone" {
   count    = data.coder_workspace.me.start_count
   source   = "registry.coder.com/coder/git-clone/coder"
-  version  = "1.1.1"
+  version  = "1.1.2"
   agent_id = coder_agent.example.id
   url      = "https://github.com/coder/coder"
 }
@@ -28,7 +28,7 @@ module "git-clone" {
 module "git-clone" {
   count    = data.coder_workspace.me.start_count
   source   = "registry.coder.com/coder/git-clone/coder"
-  version  = "1.1.1"
+  version  = "1.1.2"
   agent_id = coder_agent.example.id
   url      = "https://github.com/coder/coder"
   base_dir = "~/projects/coder"
@@ -43,12 +43,12 @@ To use with [Git Authentication](https://coder.com/docs/v2/latest/admin/git-prov
 module "git-clone" {
   count    = data.coder_workspace.me.start_count
   source   = "registry.coder.com/coder/git-clone/coder"
-  version  = "1.1.1"
+  version  = "1.1.2"
   agent_id = coder_agent.example.id
   url      = "https://github.com/coder/coder"
 }
 
-data "coder_git_auth" "github" {
+data "coder_external_auth" "github" {
   id = "github"
 }
 ```
@@ -69,7 +69,7 @@ data "coder_parameter" "git_repo" {
 module "git_clone" {
   count    = data.coder_workspace.me.start_count
   source   = "registry.coder.com/coder/git-clone/coder"
-  version  = "1.1.1"
+  version  = "1.1.2"
   agent_id = coder_agent.example.id
   url      = data.coder_parameter.git_repo.value
 }
@@ -103,7 +103,7 @@ Configuring `git-clone` for a self-hosted GitHub Enterprise Server running at `g
 module "git-clone" {
   count    = data.coder_workspace.me.start_count
   source   = "registry.coder.com/coder/git-clone/coder"
-  version  = "1.1.1"
+  version  = "1.1.2"
   agent_id = coder_agent.example.id
   url      = "https://github.example.com/coder/coder/tree/feat/example"
   git_providers = {
@@ -122,7 +122,7 @@ To GitLab clone with a specific branch like `feat/example`
 module "git-clone" {
   count    = data.coder_workspace.me.start_count
   source   = "registry.coder.com/coder/git-clone/coder"
-  version  = "1.1.1"
+  version  = "1.1.2"
   agent_id = coder_agent.example.id
   url      = "https://gitlab.com/coder/coder/-/tree/feat/example"
 }
@@ -134,7 +134,7 @@ Configuring `git-clone` for a self-hosted GitLab running at `gitlab.example.com`
 module "git-clone" {
   count    = data.coder_workspace.me.start_count
   source   = "registry.coder.com/coder/git-clone/coder"
-  version  = "1.1.1"
+  version  = "1.1.2"
   agent_id = coder_agent.example.id
   url      = "https://gitlab.example.com/coder/coder/-/tree/feat/example"
   git_providers = {
@@ -155,7 +155,7 @@ For example, to clone the `feat/example` branch:
 module "git-clone" {
   count       = data.coder_workspace.me.start_count
   source      = "registry.coder.com/coder/git-clone/coder"
-  version     = "1.1.1"
+  version     = "1.1.2"
   agent_id    = coder_agent.example.id
   url         = "https://github.com/coder/coder"
   branch_name = "feat/example"
@@ -173,7 +173,7 @@ For example, this will clone into the `~/projects/coder/coder-dev` folder:
 module "git-clone" {
   count       = data.coder_workspace.me.start_count
   source      = "registry.coder.com/coder/git-clone/coder"
-  version     = "1.1.1"
+  version     = "1.1.2"
   agent_id    = coder_agent.example.id
   url         = "https://github.com/coder/coder"
   folder_name = "coder-dev"