Merge #20985: doc: add xorriso to macOS depends packages

5b41d84 doc: add xorriso to macOS depends packages (fanquake)

Pull request description:

  This was missed in #20470.

ACKs for top commit:
  hebasto:
    ACK 5b41d84, tested on Linux Mint 20.1 (x86_64).

Tree-SHA512: bcfd8468a099c69175f8a9d295c1466764ab25d6a61121b28675a09c3e96f45b6309e1523d341f4cb21d0ddee4945f00ba060ba02da835f2f0db7e694fd6c44b

Author: fanquake

depends/README.md

@@ -44,7 +44,7 @@ The paths are automatically configured and no other options are needed unless ta
 
 #### For macOS cross compilation
 
-    sudo apt-get install curl librsvg2-bin libtiff-tools bsdmainutils cmake imagemagick libcap-dev libz-dev libbz2-dev python3-setuptools libtinfo5
+    sudo apt-get install curl librsvg2-bin libtiff-tools bsdmainutils cmake imagemagick libcap-dev libz-dev libbz2-dev python3-setuptools libtinfo5 xorriso
 
 #### For Win64 cross compilation