Add octal color escape

Author: jsoref

.github/actions/spelling/candidate.patterns

@@ -403,7 +403,7 @@ ipfs://[0-9a-zA-Z]{3,}
 \bgetopts\s+(?:"[^"]+"|'[^']+')
 
 # ANSI color codes
-(?:\\(?:u00|x)1[Bb]|\x1b|\\u\{1[Bb]\})\[\d+(?:;\d+)*m
+(?:\\(?:u00|x)1[Bb]|\\03[1-7]|\x1b|\\u\{1[Bb]\})\[\d+(?:;\d+)*m
 
 # URL escaped characters
 %[0-9A-F][A-F](?=[A-Za-z])