Revert version to 1.2.0; gotcha docs were documentation-only

The issue #1 gotcha documentation was a doc-only change and did not
warrant a version bump. Revert plugin.json from 1.3.0 → 1.2.0.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

plugins/obsidian-cli/.claude-plugin/plugin.json

@@ -1,7 +1,7 @@
 {
   "name": "obsidian-cli",
   "description": "Interact with Obsidian vaults using the official Obsidian CLI (v1.12+). Read, create, append, search, and manage notes, daily notes, properties, tags, tasks, bookmarks, templates, themes, sync, plugins, and links — all from the terminal.",
-  "version": "1.3.0",
+  "version": "1.2.0",
   "author": {
     "name": "pablo-mano"
   },