Add SmashingConf Amsterdam for ux, css (tech-conferences#8304)

* Add SmashingConf Amsterdam for ux

* Add SmashingConf Amsterdam for css

Author: confs-tech-bot

conferences/2026/css.json

@@ -1,4 +1,16 @@
 [
+  {
+    "name": "SmashingConf Amsterdam",
+    "url": "https://smashingconf.com/amsterdam-2026",
+    "startDate": "2026-04-13",
+    "endDate": "2026-04-16",
+    "city": "Amsterdam",
+    "country": "Netherlands",
+    "online": true,
+    "locales": "EN",
+    "cocUrl": "https://smashingconf.com/codeofconduct",
+    "bluesky": "smashingconf.com"
+  },
   {
     "name": "JSHeroes",
     "url": "https://jsheroes.io",

conferences/2026/ux.json

@@ -12,6 +12,18 @@
     "cocUrl": "https://conveyux.com/code-of-conduct/",
     "bluesky": "conveyux.bsky.social"
   },
+  {
+    "name": "SmashingConf Amsterdam",
+    "url": "https://smashingconf.com/amsterdam-2026",
+    "startDate": "2026-04-13",
+    "endDate": "2026-04-16",
+    "city": "Amsterdam",
+    "country": "Netherlands",
+    "online": true,
+    "locales": "EN",
+    "cocUrl": "https://smashingconf.com/codeofconduct",
+    "bluesky": "smashingconf.com"
+  },
   {
     "name": "UX Rotterdam",
     "url": "https://uxrotterdam.com",