message: Add VC++ v14 Framework dependency note
  ## Summary of the Pull Request
  VC++ v14 Descktop Framework package is required and not installed automatically when installing package manually.
  ## PR Checklist
  * [X] CLA signed. If not, go over [here](https://cla.opensource.microsoft.com/microsoft/Terminal) and sign the CLA
diff: @@ -54,6 +54,8 @@ Add-AppxPackage Microsoft.WindowsTerminal_<versionNumber>.msixbundle
  > **Note**: If you install Terminal manually:
  >
  +> * You may need to install the [VC++ v14 Desktop Framework Package](https://docs.microsoft.com/troubleshoot/cpp/c-runtime-packages-desktop-bridge#how-to-install-and-update-desktop-framework-packages).
  +> This should only be necessary on older builds of Windows 10 and only if you get an error about missing framework packages.
  > * Terminal will not auto-update when new builds are released so you will need
  > to regularly install the latest Terminal release to receive all the latest
  > fixes and improvements!
  