site: add a highlight of new feature

Related to panjf2000#133

website/highlights/2020-09-13-supported-locking-os-thread.md

@@ -0,0 +1,16 @@
+---
+last_modified_on: "2020-09-13"
+$schema: "/.meta/.schemas/highlights.json"
+title: "Support locking OS thread"
+description: "Support locking each I/O event-loop goroutine to an OS thread"
+author_github: "https://github.com/panjf2000"
+pr_numbers: [6fd6413]
+release: "features"
+hide_on_release_notes: false
+tags: ["type: new feature", "domain: thread", "platform: arm64"]
+---
+
+## About this change
+
+Add functional option `LockOSThread` used to determine whether each I/O event-loop is associated to an OS thread, it is useful when you need some kind of mechanisms like thread local storage, 
+or invoke certain C libraries (such as graphics lib: GLib) that require thread-level manipulation via cgo, or want all I/O event-loops to actually run in parallel for a potential higher performance. 

website/metadata.js

@@ -4,7 +4,7 @@ module.exports = {
     "date": "2020-05-11",
     "description": "Released v1.2.0",
     "hide_on_release_notes": false,
-    "id": "2020-07-05-releasing-1-2-0",
+    "id": "2020-05-11-released-1-2-0",
     "path": "website/highlights/2020-05-11-released-1-2-0.md",
     "permalink": "/highlights/2020-05-11-released-1-2-0/",
     "tags": [