Delete trailing whitespace in the Markdown template

[mrwacky42]

I am hoping this patch fixes this problem:

Terraform Readme.........................................................Failed
hookid: terraform_readme

Files were modified by this hook.

Terraform fmt............................................................Passed
Terraform validate without variables.....................................Passed
Check Yaml...........................................(no files to check)Skipped
Check JSON...........................................(no files to check)Skipped
Check for broken symlinks............................(no files to check)Skipped
Forbid new submodules....................................................Passed
Mixed line ending........................................................Passed
Don't commit to branch...................................................Passed
Pretty format JSON...................................(no files to check)Skipped
Fix End of Files.........................................................Passed
Trim Trailing Whitespace.................................................Failed
hookid: trailing-whitespace