Update "Trusted by developers worldwide": add Qualcomm, remove imgproxy (#15)

Swaps out `imgproxy` (niche image-proxy tool, low name recognition) for
`qualcomm` (major semiconductor/software organization) in the homepage's
trusted-organizations logo grid.

### Changes
- `docs/index.md`: replace `imgproxy` logo item with `qualcomm`

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: shenxianpeng <3353385+shenxianpeng@users.noreply.github.com>

Author: Copilot

docs/index.md

@@ -74,8 +74,8 @@ title: C/C++ Linting
     <span>CachyOS</span>
   </div>
   <div class="logo-item">
-    <img src="https://github.com/imgproxy.png" alt="Imgproxy" title="Imgproxy">
-    <span>Imgproxy</span>
+    <img src="https://github.com/qualcomm.png" alt="Qualcomm" title="Qualcomm">
+    <span>Qualcomm</span>
   </div>
   <div class="logo-item">
     <img src="https://github.com/zondax.png" alt="Zondax" title="Zondax">