Add RTM icon (#8066)

Co-authored-by: PratyushJayachandran <35000807+PratyushJayachandran@users.noreply.github.com>

_data/simple-icons.json

@@ -11672,6 +11672,19 @@
             "hex": "00BCF6",
             "source": "https://www.rtl2.de"
         },
+        {
+            "title": "RTM",
+            "hex": "36474F",
+            "source": "https://www.rtm.fr",
+            "aliases": {
+                "aka": [
+                    "Régie des Transports Métropolitains"
+                ],
+                "old": [
+                    "Régie des Transports de Marseille"
+                ]
+            }
+        },
         {
             "title": "RuboCop",
             "hex": "000000",

icons/rtm.svg

@@ -0,0 +1 @@
+<svg role="img" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><title>RTM</title><path d="M5.584 9.054H1.98l-.487 1.413h3.408c.54 0 .594.25.51.494-.084.244-.18.323-.719.323h-3.43L0 14.946h1.917l.892-2.454c.263 0 .33.024.436.257l1.043 2.197h2.084l-1.148-2.46c1.368-.15 1.985-.822 2.206-1.698.211-.837-.173-1.734-1.846-1.734m2.817 0-.487 1.413H10l-1.541 4.48 2.036-.001 1.54-4.479h1.94l.486-1.413H8.4zm7.89 0h-1.306l-.485 1.414h.624c.272 0 .416.22.322.493l-1.368 3.985h2.036l1.37-3.988c.37-1.08.053-1.905-1.194-1.904m3.186 0h-1.16l-.486 1.414h.48c.271 0 .415.22.322.493l-1.368 3.985H19.3l1.37-3.988c.37-1.08.053-1.904-1.194-1.904m3.185 0h-1.16l-.485 1.414h.479c.272 0 .416.22.323.493l-1.369 3.985h2.036l1.37-3.988c.37-1.08.054-1.904-1.194-1.904"/></svg>