Update documentation.md

The4codeblocks · web-flow · commit 9f1d7c30be1b · 2023-07-13T15:46:16.000+02:00
diff --git a/documentation.md b/documentation.md
@@ -5,3 +5,5 @@
 `compression.register_compressed_tiers(node)`: Registers compressed versions of the provided `node`; If the provided node has been compressed previously, `groups.compressed` must be set to however many times it has been compressed. (eg. `moreblocks:cobble_compressed` must have a `groups.compressed` value of `1`.)
 
 `compression.register_compressed_nodes(nodes)`: Registers every node in the provided table. (eg. `{"default:cobble", "default:desert_cobble"}`)
+
+`max_compression_level`: The maximum compression tier; Default is 10.
