docs(changelog): add the #1704 fragment

Co-Authored-By: Claude Fable 5.2 <[email protected]>

changelog.d/1704-camera-nadir-zoom-crash.md

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+- Fix rendering stopping for good after a wheel zoom with the pointer on the
+  centre of a whole-globe view. Cesium's zoom could ask the camera to rotate
+  about a zero axis; that rotation is now ignored, and a render loop stopped by
+  any error is restarted from the last drawn camera pose, up to three times in
+  ten seconds (mazy1998, #1704).