Update README.md

Packages/rt.xr.maf/README.md

@@ -9,16 +9,18 @@ The MAF library and media pipeline plugins should be compiled by following instr
 
 ## Package content
 
-rt.xr.maf
-  bin/
+```
+rt.xr.maf/
+├── bin/
     - plateform specific builds of the maf library & swig bindings wrapper
     - media pipeline plugins:
-      - avpipeline: a simple media pipeline using libav for media fetching, decoding & processing
-  maf/
-    - C# source code of the swig bindings. While most of the wrapper's C# code is auto-generated by swig and should not be modified manually, this [specific to Unity related issue](https://github.com/swig/swig/pull/1262) required a minor manual modification to `maf/swig/mafPInvoke.cs`.
-  dependencies/
+      - avpipeline: a simple media pipeline using libav for media fetching, decoding & processing README.md
+├── maf/
+    - C# source code of the swig bindings. See note.
+├── dependencies/
     - platform specific builds of shared dependencies, see [dependencies/README.md](./dependencies/README.md)
-  Plugins.cs
+└── Plugins.cs
     - registration of media pipeline plugins
-
-
+```
+> [!NOTE]
+> While most of the wrapper's C# code is auto-generated by swig and should not be modified manually, this [specific to Unity related issue](https://github.com/swig/swig/pull/1262) required a minor manual modification to `maf/swig/mafPInvoke.cs`.