MD026 Trailing punctuation in header

This rule is broken when we have ".,;::!?" in the headers.
We have removed the ones with ":" but kept the ones
with "?", so this rule will always warn in these cases.

docs/en/features/census_configuration.md

@@ -1,4 +1,4 @@
-# Configure connection to the Census:
+# Configure connection to the Census
 
 The objective of this service is to be able to configure the connection with the Town Hall Census through the Administration panel without having to modify the application code.
 

docs/en/installation/deploying-on-heroku.md

@@ -127,7 +127,7 @@ Add this to `config/secrets.yml`, under the `production:` section:
 
 Important: Turn on one worker dyno so that emails get sent.
 
-## Optional but recommended:
+## Optional but recommended
 
 ### Install rails\_12factor and specify the Ruby version
 

docs/en/installation/servers.md

@@ -1,8 +1,8 @@
 # Production and Staging servers
 
-## Recommended Minimum System Requirements:
+## Recommended Minimum System Requirements
 
-### 1. Production Server:
+### 1. Production Server
 
 - Distribution: Ubuntu 16.04.X
 - RAM: 32GB
@@ -10,7 +10,7 @@
 - Hard Drive: 20 GB
 - Database: Postgres
 
-### 2. Staging Server:
+### 2. Staging Server
 
 - Distribution: Ubuntu 16.04.X
 - RAM: 16GB