fix an internal link (#34038)

files/en-us/learn/tools_and_testing/cross_browser_testing/javascript/index.md

@@ -260,7 +260,7 @@ For example, to check whether the browser supports CSS container queries, you co
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-As a last point, don't confuse feature detection with **browser sniffing** (detecting what specific browser is accessing the site) — this is a terrible practice that should be discouraged at all costs. See [Using bad browser sniffing code](#using_bad_browser_sniffing_code), later on, for more details.
+As a last point, don't confuse feature detection with **browser sniffing** (detecting what specific browser is accessing the site) — this is a terrible practice that should be discouraged at all costs. See [don't browser sniff](#dont_browser_sniff), later on, for more details.
 
 > **Note:** Feature detection will be covered in a lot more detail in its own dedicated article, later in the module.