rename XRResetState to _resetXRState (#31105)

src/renderers/common/Renderer.js

@@ -2229,7 +2229,7 @@ class Renderer {
 	 * Resets the renderer to the initial state before WebXR started.
 	 *
 	 */
-	XRResetState() {
+	_resetXRState() {
 
 		this.backend.setXRTarget( null );
 		this.setOutputRenderTarget( null );

src/renderers/common/XRManager.js

@@ -1297,7 +1297,7 @@ function onSessionEnd() {
 
 	// restore framebuffer/rendering state
 
-	renderer.XRResetState();
+	renderer._resetXRState();
 
 	this._session = null;
 	this._xrRenderTarget = null;