fix: number of keywords

Author: vladimirvolek

Cargo.toml

@@ -2,7 +2,7 @@
 name = "blockfrost"
 version = "0.2.1"
 edition = "2021"
-keywords = ["blockfrost", "blockchain", "cardano", "ipfs", "nft", "rust"]
+keywords = ["blockfrost", "blockchain", "cardano", "ipfs", "nft"]
 categories = ["cardano", "ipfs", "nft", "blockchain"]
 description = "A Rust SDK for Blockfrost.io API"
 license = "Apache-2.0"