fix: Remove trailing whitespace from Terraform version

[christippett]

Terraform's $version includes a single trailing whitespace that restricts the formatting options available to the user.

Description

This PR removes the trailing whitespace that's appended to Terraform's version.

Motivation and Context

I've styled Starship's modules as 'pills' with a background colour that's different from the terminal. In its current form it's not possible to have Terraform's version flush with the edge.

Example configuration (Nerd Font won't render on GitHub, but you get the idea).

[terraform]
format = "[](black)[$symbol$version]($style)[](black) "
version_format = "$raw"

style = "purple bg:black"
symbol = "ﯟ "

If the space is desired, it can be added explicitly by the user. This is consistent with how other module's versions are formatted.

format = "[$symbol$version $workspace]($style) "

Screenshots (if appropriate):

See above.

How Has This Been Tested?

• I have tested using MacOS
• I have tested using Linux
• I have tested using Windows

Checklist:

• I have updated the documentation accordingly.
• I have updated the tests accordingly.

[vladimyr]

LGTM

@christippett Thanks for making it consistent with other modules. 👍