feat: add the `i` and `small` tags to the sanitizer's allowlist

internal/reader/sanitizer/sanitizer.go

@@ -45,6 +45,7 @@ var (
 		"h5":         {"id"},
 		"h6":         {"id"},
 		"hr":         {},
+		"i":          {},
 		"iframe":     {"width", "height", "frameborder", "src", "allowfullscreen"},
 		"img":        {"alt", "title", "src", "srcset", "sizes", "width", "height", "fetchpriority", "decoding"},
 		"ins":        {},
@@ -60,6 +61,7 @@ var (
 		"rtc":        {},
 		"ruby":       {},
 		"s":          {},
+		"small":      {},
 		"samp":       {},
 		"source":     {"src", "type", "srcset", "sizes", "media"},
 		"strong":     {},