Recognize copyright statements

Author: jsoref

.github/actions/spelling/candidate.patterns

@@ -7,6 +7,9 @@
 # cspell inline
 ^.*\b[Cc][Ss][Pp][Ee][Ll]{2}:\s*[Dd][Ii][Ss][Aa][Bb][Ll][Ee]-[Ll][Ii][Nn][Ee]\b
 
+# copyright
+Copyright (?:\([Cc]\)|)(?:[-\d, ]|and)+(?: [A-Z][a-z]+ [A-Z][a-z]+,?)+
+
 # patch hunk comments
 ^@@ -\d+(?:,\d+|) \+\d+(?:,\d+|) @@ .*
 # git index header