common : Update stb_image.h to latest version (#9161)

* Update stb_image.h to latest version

Fixes https://github.com/ggerganov/llama.cpp/issues/7431

* Update .ecrc

.ecrc

@@ -1,5 +1,5 @@
 {
-  "Exclude": ["^\\.gitmodules$"],
+  "Exclude": ["^\\.gitmodules$", "stb_image\\.h"],
   "Disable": {
     "IndentSize": true
   }