Update changelog and version after v3.27.3

Author: github-actions[bot]

CHANGELOG.md

@@ -4,6 +4,10 @@ See the [releases page](https://github.com/github/codeql-action/releases) for th
 
 Note that the only difference between `v2` and `v3` of the CodeQL Action is the node version they support, with `v3` running on node 20 while we continue to release `v2` to support running on node 16. For example `3.22.11` was the first `v3` release and is functionally identical to `2.22.11`. This approach ensures an easy way to track exactly which features are included in different versions, indicated by the minor and patch version numbers.
 
+## [UNRELEASED]
+
+No user facing changes.
+
 ## 3.27.3 - 12 Nov 2024
 
 No user facing changes.

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "codeql",
-  "version": "3.27.3",
+  "version": "3.27.4",
   "private": true,
   "description": "CodeQL action",
   "scripts": {