fix(deps): update module github.com/elazarl/goproxy to v1.8.1

Author: renovate-bot

go.mod

@@ -6,7 +6,7 @@ toolchain go1.25.6
 
 require (
 	github.com/JohannesKaufmann/html-to-markdown/v2 v2.5.0
-	github.com/elazarl/goproxy v1.8.0
+	github.com/elazarl/goproxy v1.8.1
 	github.com/go-shiori/go-epub v1.2.1
 	github.com/go-shiori/go-readability v0.0.0-20251205110129-5db1dc9836f0
 	github.com/jedib0t/go-pretty/v6 v6.7.8