Bump @primer/octicons from 19.14.0 to 19.15.5 (#57147)

Author: sophietheking

package-lock.json

@@ -255,7 +255,7 @@
     "@primer/behaviors": "^1.7.2",
     "@primer/css": "^21.3.1",
     "@primer/live-region-element": "^0.7.2",
-    "@primer/octicons": "^19.14.0",
+    "@primer/octicons": "^19.15.5",
     "@primer/octicons-react": "^19.14.0",
     "@primer/react": "36.27.0",
     "accept-language-parser": "^1.5.0",