Add Wall of Browser Bugs entry for #16915

https://connect.microsoft.com/IE/feedback/details/2274240/edge-edge-renders-an-svg-img-with-max-width-100-too-small
[skip sauce]

docs/_data/browser-bugs.yml

@@ -1,3 +1,13 @@
+-
+  browser: >
+    Microsoft Edge
+  summary: >
+    Edge renders an SVG `<img>` with `max-width:100%;` too small
+  upstream_bug: >
+    IE#2274240
+  origin: >
+    Bootstrap#16915
+
 -
   browser: >
     Internet Explorer 11 & Microsoft Edge