chore: Update CHANGELOG.md

chore: allow non-write users to trigger claude-code-action workflows

CHANGELOG.md

@@ -1,7 +1,20 @@
 # Changelog
 
+## 2.1.9
+
+- Added `auto:N` syntax for configuring the MCP tool search auto-enable threshold, where N is the context window percentage (0-100)
+- Added `plansDirectory` setting to customize where plan files are stored
+- Added external editor support (Ctrl+G) in AskUserQuestion "Other" input field
+- Added session URL attribution to commits and PRs created from web sessions
+- Added support for `PreToolUse` hooks to return `additionalContext` to the model
+- Added `${CLAUDE_SESSION_ID}` string substitution for skills to access the current session ID
+- Fixed long sessions with parallel tool calls failing with an API error about orphan tool_result blocks
+- Fixed MCP server reconnection hanging when cached connection promise never resolves
+- Fixed Ctrl+Z suspend not working in terminals using Kitty keyboard protocol (Ghostty, iTerm2, kitty, WezTerm)
+
 ## 2.1.7
 
+- Added customizable keyboard shortcuts via `~/.claude/keybindings.json`. Run `/keybindings` to get started. Learn more at https://code.claude.com/docs/en/keybindings
 - Added `showTurnDuration` setting to hide turn duration messages (e.g., "Cooked for 1m 6s")
 - Added ability to provide feedback when accepting permission prompts
 - Added inline display of agent's final response in task notifications, making it easier to see results without reading the full transcript file