fix(deps): update dependency y-prosemirror to ^1.3.4 (stable31)

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
y-prosemirror	^1.3.3 -> ^1.3.4

---

Release Notes

yjs/y-prosemirror (y-prosemirror)

v1.3.4

Compare Source

• [undo plugin] optimize #​18396db316
• Merge pull request #​183 from nperez0111/undo-redo-commands e534deb
• feat: add undoCommand and redoCommand1f43175

---

---

Configuration

📅 Schedule: Branch creation - "every weekend" in timezone Europe/Berlin, Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 51.87%. Comparing base (e6fe527) to head (8c207ca).
Report is 2 commits behind head on stable31.

Additional details and impacted files

@@ Coverage Diff @@## stable31 #7150 +/- ##
=========================================
Coverage 51.87% 51.87% =========================================
Files 287 287 Lines 40836 40836 Branches 794 794 =========================================
Hits 21182 21182 Misses 19533 19533 Partials 121 121 

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.