Add Open Tech Day: Software-defined Storage for opensource (tech-conferences#8271)

Author: confs-tech-bot

conferences/2026/opensource.json

@@ -173,6 +173,20 @@
     "cfpEndDate": "2026-02-15",
     "mastodon": "@berlinbuzzwords@floss.social"
   },
+  {
+    "name": "Open Tech Day: Software-defined Storage",
+    "url": "https://opentechday.de",
+    "startDate": "2026-10-01",
+    "endDate": "2026-10-01",
+    "city": "Nürnberg",
+    "country": "Germany",
+    "online": false,
+    "locales": "EN,DE",
+    "offersSignLanguageOrCC": true,
+    "cocUrl": "https://opentechday.de/code-of-conduct/",
+    "cfpUrl": "https://opentechday.de/propose",
+    "cfpEndDate": "2026-05-31"
+  },
   {
     "name": "Open Source Monitoring conference",
     "url": "https://osmc.de",