fix broken links in TOC

doc/user-guide/user-guide.md

@@ -21,7 +21,7 @@
     + [Photometric parameters](#photometric-parameters)
     + [Exposure compensation](#exposure-compensation)
     + [Manual Adjustments](#manual-adjustments)
-  * [Stabilization & Orientation](#stabilization---orientation)
+  * [Stabilization & Orientation](#stabilization--orientation)
     + [Stabilization](#stabilization)
     + [Orientation](#orientation)
   * [Output configuration](#output-configuration)
@@ -30,9 +30,9 @@
     + [Encoder settings](#encoder-settings)
     + [Audio settings](#audio-settings)
     + [Batch stitcher](#batch-stitcher)
-- [Useful Tips & Troubleshooting](#useful-tips---troubleshooting)
-    + [Building your own 360° camera rig](#building-your-own-360--camera-rig)
-    + [Filming with a 360° camera rig](#filming-with-a-360--camera-rig)
+- [Useful Tips & Troubleshooting](#useful-tips--troubleshooting)
+    + [Building your own 360° camera rig](#building-your-own-360-camera-rig)
+    + [Filming with a 360° camera rig](#filming-with-a-360-camera-rig)
     + [Working with VideoStitch Studio - Troubleshooting](#working-with-videostitch-studio---troubleshooting)
     + [Keyboard shortcuts](#keyboard-shortcuts)