add icon to download button

package-lock.json

@@ -8,6 +8,7 @@
       "name": "resumarkdown",
       "version": "0.0.1",
       "dependencies": {
+        "iconify-icon": "^2.1.0",
         "rehype-document": "^7.0.3",
         "rehype-sanitize": "^6.0.0",
         "rehype-stringify": "^10.0.1",
@@ -440,6 +441,12 @@
         "node": ">=12"
       }
     },
+    "node_modules/@iconify/types": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/@iconify/types/-/types-2.0.0.tgz",
+      "integrity": "sha512-+wluvCrRhXrhyOmRDJ3q8mux9JkKy5SJ/v8ol2tu4FVjyYvtEzkc/3pK15ET6RKg4b4w4BmTk1+gsCUhf21Ykg==",
+      "license": "MIT"
+    },
     "node_modules/@jridgewell/gen-mapping": {
       "version": "0.3.5",
       "resolved": "https://registry.npmjs.org/@jridgewell/gen-mapping/-/gen-mapping-0.3.5.tgz",
@@ -1511,6 +1518,18 @@
         "url": "https://github.com/sponsors/wooorm"
       }
     },
+    "node_modules/iconify-icon": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/iconify-icon/-/iconify-icon-2.1.0.tgz",
+      "integrity": "sha512-lto4XU3bwTQnb+D/CsJ4dWAo0aDe+uPMxEtxyOodw9l7R9QnJUUab3GCehlw2M8mDHdeUu/ufx8PvRQiJphhXg==",
+      "license": "MIT",
+      "dependencies": {
+        "@iconify/types": "^2.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/cyberalien"
+      }
+    },
     "node_modules/iconv-lite": {
       "version": "0.6.3",
       "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.6.3.tgz",