fix(builtin.live_grep): add spacer ":" even when coordinates disabled

[l-kershaw]

Description

Pretty sure this is my first pull request which only added a single character 🤣

Fixes #2226

@simonmandlik does this fix your issue?

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list relevant details about your configuration

• ran :Telescope live_grep disable_coordinates=true
• ran :Telescope live_grep disable_coordinates=false
• Both worked as expected

Configuration:

• Neovim version (nvim --version):
  NVIM v0.9.0-dev-522+g174335923
  Build type: RelWithDebInfo
  LuaJIT 2.1.0-beta3
  Compiled by runneradmin@fv-az211-249
• Operating system and version:
  Windows 10

Checklist:

• My code follows the style guidelines of this project (stylua)
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (lua annotations)

[simonmandlik]

Looks like it does :)

[l-kershaw]

@Conni2461 do you know why the docgen is removing loads of stuff about actions here?
I haven't touched the relevant files at all.

[Conni2461]

Should be fixed. Thanks for the PR :)