Update docs/keys/proxies/index.md

Co-authored-by: Maciej Kula <github@mcjkula.com>

Author: chideraao

docs/keys/proxies/index.md

@@ -1,6 +1,6 @@
 # Proxies
 
-This document introduces the proxy pattern used in Bittensor and explains how it enables secure delegation of account permissions for specific classes of calls.
+This page introduces the proxy pattern used in Bittensor and explains how it enables secure delegation of account permissions for specific classes of calls.
 
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