fix(icons): changed signpost icon (#3531)

* Updated icons/signpost.svg

* Updated icons/signpost.svg

* Updated icons/signpost.json

* Updated icons/signpost.svg

* Updated icons/milestone.svg

* Apply suggestions from code review

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

---------

Co-authored-by: Eric Fennis <eric.fennis@gmail.com>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

icons/milestone.svg

@@ -11,5 +11,5 @@
 >
   <path d="M12 13v8" />
   <path d="M12 3v3" />
-  <path d="M4 6a1 1 0 0 0-1 1v5a1 1 0 0 0 1 1h13a2 2 0 0 0 1.152-.365l3.424-2.317a1 1 0 0 0 0-1.635l-3.424-2.318A2 2 0 0 0 17 6z" />
+  <path d="M18.172 6a2 2 0 0 1 1.414.586l2.06 2.06a1.207 1.207 0 0 1 0 1.708l-2.06 2.06a2 2 0 0 1-1.414.586H4a1 1 0 0 1-1-1V7a1 1 0 0 1 1-1z" />
 </svg>

icons/signpost.json

@@ -2,9 +2,20 @@
   "$schema": "../icon.schema.json",
   "contributors": [
     "danielbayley",
-    "karsa-mistmere"
+    "karsa-mistmere",
+    "jguddas"
   ],
   "tags": [
+    "navigation",
+    "direction",
+    "arrow",
+    "wayfinding",
+    "guide",
+    "location",
+    "pointer",
+    "route",
+    "indicator",
+    "marker",
     "bidirectional",
     "left",
     "right",

icons/signpost.svg

@@ -11,5 +11,5 @@
 >
   <path d="M12 13v8" />
   <path d="M12 3v3" />
-  <path d="M18 6a2 2 0 0 1 1.387.56l2.307 2.22a1 1 0 0 1 0 1.44l-2.307 2.22A2 2 0 0 1 18 13H6a2 2 0 0 1-1.387-.56l-2.306-2.22a1 1 0 0 1 0-1.44l2.306-2.22A2 2 0 0 1 6 6z" />
+  <path d="M2.354 10.354a1.207 1.207 0 0 1 0-1.708l2.06-2.06A2 2 0 0 1 5.828 6h12.344a2 2 0 0 1 1.414.586l2.06 2.06a1.207 1.207 0 0 1 0 1.708l-2.06 2.06a2 2 0 0 1-1.414.586H5.828a2 2 0 0 1-1.414-.586z" />
 </svg>