Add workflow icon (#1132)

* Add `workflow` icon

* Update icons/workflow.svg

Co-authored-by: Jakob Guddas <github@jguddas.de>

---------

Co-authored-by: Jakob Guddas <github@jguddas.de>

icons/workflow.json

@@ -0,0 +1,16 @@
+{
+  "$schema": "../icon.schema.json",
+  "tags": [
+    "action",
+    "continuous integration",
+    "ci",
+    "automation",
+    "devops",
+    "network",
+    "node",
+    "connection"
+  ],
+  "categories": [
+    "development"
+  ]
+}

icons/workflow.svg

@@ -0,0 +1,15 @@
+<svg
+  xmlns="http://www.w3.org/2000/svg"
+  width="24"
+  height="24"
+  viewBox="0 0 24 24"
+  fill="none"
+  stroke="currentColor"
+  stroke-width="2"
+  stroke-linecap="round"
+  stroke-linejoin="round"
+>
+  <rect width="8" height="8" x="3" y="3" rx="2" />
+  <path d="M7 11v4a2 2 0 0 0 2 2h4" />
+  <rect width="8" height="8" x="13" y="13" rx="2" />
+</svg>