Add pattern for go regular expressions

Author: jsoref

.github/actions/spelling/candidate.patterns

@@ -498,6 +498,9 @@ Name\[[^\]]+\]=.*
 # golang print-f-style functions
 (?i)(?<=append|comma|debug|equal|err|error|exit|fatal|format|info|log|name|panic|print|skip|scan|string|trace|true|warn|warning|wrap|write)(?:f|ln)[ (]
 
+# golang regular expression
+\br".+?"
+
 # imports
 ^import\s+(?:(?:static|type)\s+|)(?:[\w.]|\{\s*\w*?(?:,\s*(?:\w*|\*))+\s*\})+(?:\s+from (['"]).*?\g{-1}|)