build: release 0.27.5

[wenytang-ms]

Bump version to 0.27.5 and complete the changelog for this release.

Changes

• Bump version to 0.27.5 in package.json and package-lock.json (the 0.27.5 CHANGELOG heading landed in docs(changelog): add PR #1022 entry #1023 without the version bump).
• Add the missing user-facing changelog entry for perf: tune Java LSP tool selection guidance #1020 (perf: tune Java LSP tool selection guidance).

Dependency bumps (#1018) and test-only PRs (#1019) are omitted, consistent with the existing changelog convention of listing only user-facing changes.

[Copilot]

Pull request overview

This PR prepares the vscode-java-dependency extension for the 0.27.5 release by aligning the published version metadata with the already-created changelog section and adding the missing user-facing changelog entry.

Changes:

• Bump extension version from 0.27.4 → 0.27.5 in package.json.
• Bump corresponding versions in package-lock.json (root and packages[""]).
• Add the missing 0.27.5 changelog entry for PR #1020 (Java LSP tool selection guidance tuning).

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
package.json	Updates extension version to 0.27.5 for the release.
package-lock.json	Keeps lockfile metadata in sync with the new 0.27.5 version.
CHANGELOG.md	Completes the 0.27.5 release notes with the missing user-facing perf entry.

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