chore: bump spring-shell-e2e dependencies

- Bump node-pty from 0.11.0-beta19 to 1.0.0
- Bump xterm-headless from 4.18.0 to 5.5.0
- Rename xterm-headless to @xterm/headless as per https://www.npmjs.com/package/xterm-headless
- Unpin Python 3.11 in e2e test by reverting commit 8097f1eb91 because it's no longer necessary as explained in https://github.com/spring-projects/spring-shell/issues/909#issuecomment-2188962147

- Fixes https://github.com/spring-projects/spring-shell/issues/909
- Fixes https://github.com/spring-projects/spring-shell/issues/921

.github/workflows/e2e.yml

@@ -95,10 +95,6 @@ jobs:
           distribution: adopt
           java-version: 22
           cache: gradle
-      - name: Use Python 3.11
-        uses: actions/setup-python@v4
-        with:
-          python-version: '3.11'
       - uses: actions/setup-node@v2
         with:
           node-version: '16'