use correct filetype for highlightjs

Author: Tobias Fuhrimann

dependencies.html.md.erb

@@ -63,7 +63,7 @@ Once dependencies are installed, you will be ready to run your app locally.
 
 Upon running `cf push`, we will also push our whole dependencies folder `node_modules`. Since Cloud Foundry runs `npm install` anyways, this is redundant and should be omitted to save bandwidth and even more importantly: time. You can create a `.cfignore` file which works just like a `.gitignore` file and which tells Cloud Foundry what files should be excluded when pushing. Let's create a `.cfignore` file and exclude the `node_modules` folder:
 
-```
+```txt
 node_modules
 ```
 

manifest.html.md.erb

@@ -7,7 +7,7 @@ owner: Tobias Fuhrimann
 
 It's tedious to keep having to specify the app name and other variables each time we push our app. That's where a `manifest.yml` file comes in handy. It holds all the configuration for our app so that Cloud Foundry will know what to do with it. Create a `manifest.yml` file in the root folder of your app and add the following content (don't forget to replace the "my-random-hostname" with your creative hostname again):
 
-```YAML
+```yaml
 ---
 applications:
 - name: my-node-app