Issue Template: **Bold** example version info

[benknoble]

Why?

Because it's easier to fill out a template when the template is actually there.

Make

## Your Environment
<!--- Include as many relevant details about the environment you experienced the bug in -->
* Version used (e.g. *Dotfiles 1.0* or *commit 7c102b6*):
* Operating System and version (e.g. *OS X 10.11.6*):
* CLI used (e.g. *Terminal*):
* Version info of relevant software (e.g. *Vim*):

more like

## Your Environment
<!--- Include as many relevant details about the environment you experienced the bug in -->
* Version used: **Dotfiles commit 7c102b6**
* Operating System and version: **OS X 10.11.6**
* CLI used: **Terminal**
* Version info of relevant software: **brew Vim**

Differences:

Your Environment

• Version used (e.g. Dotfiles 1.0 or commit 7c102b6):
• Operating System and version (e.g. OS X 10.11.6):
• CLI used (e.g. Terminal):
• Version info of relevant software (e.g. Vim):

Your Environment

• Version used: Dotfiles commit 7c102b6
• Operating System and version: OS X 10.11.6
• CLI used: Terminal
• Version info of relevant software: brew Vim