fix: typo

License: MIT
Signed-off-by: Marcin Rataj <lidel@lidel.org>

Author: lidel

Diff for: SPEC/DAG.md

@@ -1,6 +1,6 @@
 # DAG API
 
-> The dag API comes to replace the `object API`, it support the creation and manipulation of dag-pb object, as well as other IPLD formats (i.e dag-cbor, ethereum-block, git, etc)
+> The dag API comes to replace the `object API`, it supports the creation and manipulation of dag-pb object, as well as other IPLD formats (i.e dag-cbor, ethereum-block, git, etc)
 
 * [dag.put](#dagput)
 * [dag.get](#dagget)