docs: update Claude Code releases to v2.1.22

Added tracking for latest releases:
- v2.1.22: Task UI improvements, Vim fixes, LSP enhancements
- v2.1.21: Version requirements, TaskCreate enhancements, auto-update checks

Updated in both YAML (machine-readable) and Markdown (human-readable) formats.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

machine-readable/claude-code-releases.yaml

@@ -3,8 +3,8 @@
 # Purpose: Track Claude Code product releases for documentation sync
 # Maintained: Manual updates when new releases are announced
 
-latest: "2.1.20"
-updated: "2026-01-27"
+latest: "2.1.22"
+updated: "2026-01-28"
 
 # ════════════════════════════════════════════════════════════════
 # RELEASES (newest first, condensed highlights only)
@@ -15,6 +15,23 @@ releases:
   # 2.1.x Series (January 2026)
   # ─────────────────────────────────────────────────────────────
 
+  - version: "2.1.22"
+    date: "2026-01-28"
+    highlights:
+      - "Improved task UI performance with virtualization"
+      - "Vim selection and deletion fixes"
+      - "LSP improvements: Kotlin support, UTF-16 ranges"
+    breaking: []
+
+  - version: "2.1.21"
+    date: "2026-01-28"
+    highlights:
+      - "Skills/commands can specify required/recommended Claude Code version"
+      - "New TaskCreate fields: category, checklist, parentId"
+      - "Automatic Claude Code update checking at session start"
+      - "Tasks appear in /context with 'Disable tasks' shortcut"
+    breaking: []
+
   - version: "2.1.20"
     date: "2026-01-27"
     highlights: