docs: Markdown code styling fix

mtchavez · mtchavez · commit 805fe2a267d5 · 2022-07-01T09:46:13.000-04:00
diff --git a/README.md b/README.md
@@ -221,7 +221,7 @@ func main() {
 There are benchmark tests to check performance of the filter. The following results
 were ran on a 2.3 GHz Intel Core i7
 
-```
+```txt
 # Updated: 2022-07-01
 
 goos: darwin
