chore(deps): Update Rust crate vaultrs to >=0.7, <0.9

Author: renovate[bot]

Cargo.toml

@@ -214,7 +214,7 @@ parking_lot = { version = ">=0.12.3, <0.13", optional = true }
 base64 = { version = ">=0.22, <0.23", optional = true }
 
 # Vault/OpenBao (for secrets-vault)
-vaultrs = { version = ">=0.7, <0.8", optional = true }
+vaultrs = { version = ">=0.7, <0.9", optional = true }
 
 # AWS (for secrets-aws)
 # NOTE: aws-config and aws-sdk-* transitively pull in aws-lc-sys, which compiles