chore: Update snapbox

Author: epage

Cargo.lock

@@ -93,7 +93,7 @@ sha2 = "0.10.8"
 shell-escape = "0.1.5"
 similar = "2.6.0"
 supports-hyperlinks = "3.0.0"
-snapbox = { version = "0.6.17", features = ["diff", "dir", "term-svg", "regex", "json"] }
+snapbox = { version = "0.6.18", features = ["diff", "dir", "term-svg", "regex", "json"] }
 tar = { version = "0.4.42", default-features = false }
 tempfile = "3.10.1"
 thiserror = "1.0.63"