Added icons for .pm similar to .pl

src/output/icons.rs

@@ -272,6 +272,7 @@ pub fn icon_for_file(file: &File<'_>) -> char {
             "pdf"           => '\u{f1c1}', // 
             "php"           => '\u{e73d}', // 
             "pl"            => '\u{e769}', // 
+            "pm"            => '\u{e769}', // 
             "png"           => '\u{f1c5}', // 
             "ppt"           => '\u{f1c4}', // 
             "pptx"          => '\u{f1c4}', // 