durable-workflow.github.io: update v2 docs

Author: durable-workflow-ops

docs/sdks/_category_.json

@@ -0,0 +1,8 @@
+{
+  "label": "SDKs",
+  "position": 6,
+  "link": {
+    "type": "generated-index",
+    "description": "Language SDKs for building workflows and activities outside of the PHP embedded package."
+  }
+}