chore(deps): update dependency @donkeyclip/motorcortex-player to v2.15.6

Author: renovate[bot]

package.json

@@ -35,7 +35,7 @@
     "@babel/plugin-transform-react-jsx": "7.16.7",
     "@babel/preset-env": "7.16.11",
     "@donkeyclip/motorcortex": "^9.5.4",
-    "@donkeyclip/motorcortex-player": "2.9.7",
+    "@donkeyclip/motorcortex-player": "2.15.6",
     "@donkeyclip/video-renderer": "1.4.2",
     "@rollup/plugin-babel": "5.3.0",
     "@rollup/plugin-commonjs": "21.0.1",