Updated README regarding regex issue in g++ 4.8 and below

yhirose · web-flow · commit 7a58c0a4302b · 2019-12-20T23:16:05.000-05:00
diff --git a/README.md b/README.md
@@ -450,7 +450,7 @@ httplib.h  httplib.cc
 NOTE
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-g++ 4.8 cannot build this library since `<regex>` in g++4.8 is [broken](https://stackoverflow.com/questions/12530406/is-gcc-4-8-or-earlier-buggy-about-regular-expressions).
+g++ 4.8 and below cannot build this library since `<regex>` in the versions are [broken](https://stackoverflow.com/questions/12530406/is-gcc-4-8-or-earlier-buggy-about-regular-expressions).
 
 License
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