fix(icons): changed milestone icon (#2281)

* Updated icons/milestone.svg

* Updated icons/milestone.json

* Updated icons/milestone.svg

* Updated icons/milestone.json

* Updated icons/milestone.json

* Updated icons/milestone.json

* Updated icons/milestone.svg

* Update icons/milestone.svg

Co-authored-by: Karsa <contact@karsa.org>

* Updated icons/signpost.svg

* Updated icons/signpost.json

* Updated icons/milestone.svg

---------

Co-authored-by: Karsa <contact@karsa.org>
Co-authored-by: Eric Fennis <eric.fennis@gmail.com>

Author: 3 people

icons/milestone.json

@@ -1,15 +1,17 @@
 {
   "$schema": "../icon.schema.json",
   "contributors": [
-    "karsa-mistmere"
+    "karsa-mistmere",
+    "jguddas"
   ],
   "tags": [
     "signpost",
     "direction",
     "right",
     "east",
     "forward",
-    "version control"
+    "version control",
+    "waypoint"
   ],
   "categories": [
     "arrows",

icons/milestone.svg

@@ -2,7 +2,7 @@
   "$schema": "../icon.schema.json",
   "contributors": [
     "danielbayley",
-    "jguddas"
+    "karsa-mistmere"
   ],
   "tags": [
     "bidirectional",