internal/nix: increase nix --version timeout (#2022)

Increase the `nix --version` command timeout from 3 seconds to 10
seconds. It was timing out in CI.

Author: gcurtis

internal/nix/nix.go

@@ -283,7 +283,7 @@ var versionInfo = sync.OnceValues(runNixVersion)
 
 func runNixVersion() (VersionInfo, error) {
 	// Arbitrary timeout to make sure we don't take too long or hang.
-	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
 	defer cancel()
 
 	// Intentionally don't use the nix.command function here. We use this to