Update README to use Consul Democracy 2.1.0

We're going to release version 2.1.0 with many changes that aren't
compatible with Consul Democracy 2.0.1, so we're creating this branch in
order to merge those changes and keep them there until we release Consul
Democracy 2.1.0.

README.md

@@ -102,7 +102,7 @@ Setup locally for your [development environment](https://docs.consuldemocracy.or
 Checkout the latest stable version:
 
 ```
-git checkout origin/2.0.1 -b stable
+git checkout origin/2.1.0 -b stable
 ```
 
 Create your `deploy-secrets.yml`
@@ -205,13 +205,13 @@ Using https instead of http is an important security configuration. Before you b
 
 Once you have that setup we need to configure the Installer to use your domain in the application.
 
-First, uncomment the `domain` variable in the [configuration file](https://github.com/consuldemocracy/installer/blob/2.0.1/group_vars/all) and update it with your domain name:
+First, uncomment the `domain` variable in the [configuration file](https://github.com/consuldemocracy/installer/blob/2.1.0/group_vars/all) and update it with your domain name:
 
 ```
 #domain: "your_domain.com"
 ```
 
-Next, uncomment the `letsencrypt_email` variable in the [configuration file](https://github.com/consuldemocracy/installer/blob/2.0.1/group_vars/all) and update it with a valid email address:
+Next, uncomment the `letsencrypt_email` variable in the [configuration file](https://github.com/consuldemocracy/installer/blob/2.1.0/group_vars/all) and update it with a valid email address:
 
 ```
 #letsencrypt_email: "your_email@example.com"
@@ -258,7 +258,7 @@ If you are on Ubuntu and would like to use its default `sudo` group instead of `
 deploy_group: sudo
 ```
 
-There are many more variables available check them out [here]((https://github.com/consuldemocracy/installer/blob/2.0.1/group_vars/all))
+There are many more variables available check them out [here]((https://github.com/consuldemocracy/installer/blob/2.1.0/group_vars/all))
 
 ## Other deployment options
 
@@ -288,7 +288,7 @@ If you do not have `root` access, you will need your system administrator to gra
 
 ## Using a different user than deploy
 
-Change the variable [deploy_user](https://github.com/consuldemocracy/installer/blob/2.0.1/group_vars/all#L12) to the username you would like to use.
+Change the variable [deploy_user](https://github.com/consuldemocracy/installer/blob/2.1.0/group_vars/all#L12) to the username you would like to use.
 
 ## Ansible Documentation