Revert opencv submodule to 4.x branch

Semyon1104 · Semyon1104 · commit 1adbb7db5848 · 2025-12-15T17:49:14.000+03:00
diff --git a/3rdparty/opencv b/3rdparty/opencv
@@ -1 +1 @@
-Subproject commit 2e3ccb4e8e098cf481c938998ff941e320fa4f85
+Subproject commit cd0699a338d421634a6e3da51130fa60c0908d73
