Prepare 0.31.1 patch release

Bump the extension version to 0.31.1 and document the VSIX packaging fix for the patch release.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: wenytang-ms

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Change Log
 
+## 0.31.1
+
+- Exclude E2E test fixtures, test plans, and generated test results from the VSIX package in https://github.com/microsoft/vscode-java-pack/pull/1659
+
 ## 0.31.0
 
 - Refactor Java Pack webviews to React 19 and `@vscode-elements/elements` in https://github.com/microsoft/vscode-java-pack/pull/1616

package-lock.json

@@ -3,7 +3,7 @@
   "displayName": "Extension Pack for Java",
   "description": "Popular extensions for Java development that provides Java IntelliSense, debugging, testing, Maven/Gradle support, project management and more",
   "license": "MIT",
-  "version": "0.31.0",
+  "version": "0.31.1",
   "publisher": "vscjava",
   "preview": false,
   "engines": {