Update ruby/ql/lib/change-notes/2022-02-28-regex-string-literals.md

Co-authored-by: intrigus-lgtm <60750685+intrigus-lgtm@users.noreply.github.com>

Author: aibaars

ruby/ql/lib/change-notes/2022-02-28-regex-string-literals.md

@@ -1,4 +1,4 @@
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 category: minorAnalysis
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-* The `Regex` class now an abstract class that extends `StringlikeLiteral` with implementations for `RegExpLiteral` and string literals that 'flow' into functions that are known to interpret string arguments as regular expressions such `Regex.new` and `String.match`.
+* The `Regex` class is now an abstract class that extends `StringlikeLiteral` with implementations for `RegExpLiteral` and string literals that 'flow' into functions that are known to interpret string arguments as regular expressions such as `Regex.new` and `String.match`.