[Doc][4/N] Reorganize API Reference (#11843)

Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>

docs/source/contributing/dockerfile/dockerfile.md

@@ -17,7 +17,7 @@ The edges of the build graph represent:
 
 - `RUN --mount=(.\*)from=...` dependencies (with a dotted line and an empty diamond arrow head)
 
-  > ```{figure} ../../assets/dev/dockerfile-stages-dependency.png
+  > ```{figure} /assets/contributing/dockerfile-stages-dependency.png
   > :align: center
   > :alt: query
   > :width: 100%