Bump Solana version to 1.5.15

program/Cargo.toml

@@ -16,11 +16,11 @@ arrayref = "0.3.6"
 num-derive = "0.3"
 num-traits = "0.2"
 num_enum = "0.5.1"
-solana-program = "1.5.11"
+solana-program = "1.5.15"
 thiserror = "1.0"
 
 [dev-dependencies]
-solana-sdk = "1.5.11"
+solana-sdk = "1.5.15"
 
 [lib]
 crate-type = ["cdylib", "lib"]