Package definition requires URL change

Installation via nimble fails:

$ nimble --verbose install stb_image
    Reading official package list
Downloading https://gitlab.com/define-private-public/stb_image-Nim using git
    Cloning latest tagged version: 2.4
     Error: Execution failed with exit code 128
        ... Command: git clone --recursive --depth 1 -b 2.4 https://gitlab.com/define-private-public/stb_image-Nim /tmp/nimble_24741/gitlabcom_defineprivatepublicstbimageNim
        ... Output: Cloning into '/tmp/nimble_24741/gitlabcom_defineprivatepublicstbimageNim'...
        ... error: RPC failed; result=22, HTTP code = 404
        ... fatal: The remote end hung up unexpectedly

Proposed solution: add .git to URL (package_official.json has been modified locally to fix this):

~/.nimble$ diff packages_official.json packages_temp.json
6504c6504
<     "url": "https://gitlab.com/define-private-public/stb_image-Nim.git",
---
>     "url": "https://gitlab.com/define-private-public/stb_image-Nim",