Bump version number

Author: mhartl

README.md

@@ -35,12 +35,12 @@ $ bundle _<version number>_ config set --local without 'production'
 $ bundle _<version number>_ install
 ```
 
-Here you should replace `<version number>` with the actual version number. For example, if `<version number>` is `2.3.10`, then the commands should look like this:
+Here you should replace `<version number>` with the actual version number. For example, if `<version number>` is `2.3.11`, then the commands should look like this:
 
 ```
-$ gem install bundler -v 2.3.10
-$ bundle _2.3.10_ config set --local without 'production'
-$ bundle _2.3.10_ install
+$ gem install bundler -v 2.3.11
+$ bundle _2.3.11_ config set --local without 'production'
+$ bundle _2.3.11_ install
 ```
 
 Next, migrate the database: