[skip ci] Update changelogs for v0.19.0-rc.1 release

GitOrigin-RevId: 274bf19dac3e56cf75284f6f9be3665163858118

Author: github-actions[bot]

CHANGELOG.md

@@ -3,6 +3,10 @@
 Mapbox welcomes participation and contributions from everyone.
 
 ## main
+
+## 11.19.0-rc.1 - 12 February, 2026
+
+### Features ✨ and improvements 🏁
 * Introduce new `LineLayer.lineElevationGroundScale` property to scale elevated lines with terrain exaggeration.
 * Promote elevated lines properties to stable: `LineLayer.lineZOffset` and `LineLayer.lineElevationReference`.
 * Introduce experimental `SymbolScaleBehavior` API to automatically scale map symbols (icons and text) based on system accessibility text size settings. Set `MapboxMap.symbolScaleBehavior` property to configure: `.system` (automatic scaling), `.system(mapping:)` (custom mapping function), or `.fixed(scaleFactor:)` (fixed scale, default is 1.0). Valid scale factor range is [0.8, 2.0]. Automatic scaling is opt-in; symbols default to fixed 1.0x scale.