Fix CHANGELOG encoding for 0.9.1 (Fix #318).

[130s]

Description

Quick fix to #318

@severin-lemaignan @v4hn Editor tools I'm using don't seem to handle correctly your name (I'll have to fix this in the near future). Hope this change would be ok for you for now.

Checklist

• Required: Code is auto formatted using clang-format
• Extended the tutorials / documentation, if necessary reference
  • --> Not applicable; this is a fix.
• Include a screenshot if changing a GUI
  • --> Not applicable; no GUI.
• Optional: Created tests, which fail without this PR reference
  • --> Since this encoding issue have happened multiple times, I have to think of adding a check.
• Optional: Decide if this should be cherry-picked to other current ROS branches (Indigo, Jade, Kinetic)
  • --> Not applicable since this is required by kinetic-devel only.

[severin-lemaignan]

Even though I'm sad that in 2016 UTF8 is not yet the default everywhere, I can leave with it, yes! ;-)

[v4hn]

@130s Please fix your setup one of these days. :)

At least this time I'm not the only one blocking the release because of their name :D.

Merging.

[davetcoleman]

Thank you @130s !