remove wild-card dependency specifier

Author: senekor

exercises/practice/robot-name/Cargo.toml

@@ -7,9 +7,7 @@ edition = "2024"
 # The full list of available libraries is here:
 # https://github.com/exercism/rust-test-runner/blob/main/local-registry/Cargo.toml
 [dependencies]
-# We use a wild-card specifier to minimize the risk of breaking existing
-# solutions in case the version in the test runner is updated.
-rand = "*"
+rand = "0.9"
 
 [lints.clippy]
 new_without_default = "allow"