Add circuit-board icon (#1065)

Update icons/circuit-board.svg

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

icons/circuit-board.json

@@ -0,0 +1,12 @@
+{
+  "$schema": "../icon.schema.json",
+  "tags": [
+    "computing",
+    "electricity",
+    "electronics"
+  ],
+  "categories": [
+    "science",
+    "development"
+  ]
+}

icons/circuit-board.svg

@@ -0,0 +1,17 @@
+<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="18" height="18" x="3" y="3" rx="2" />
+  <path d="M11 9h4a2 2 0 0 0 2-2V3" />
+  <circle cx="9" cy="9" r="2" />
+  <path d="M7 21v-4a2 2 0 0 1 2-2h4" />
+  <circle cx="15" cy="15" r="2" />
+</svg>