chore(deps): upgrade actions/cache action to v5

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
actions/cache	action	major	v4 -> v5

---

Release Notes

actions/cache (actions/cache)

v5

Compare Source

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), 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.

[pycord-app[bot]]

Thanks for opening this pull request! Please make sure you have read the Contributing Guidelines and Code of Conduct.

This pull request can be checked-out with:

git fetch origin pull/3026/head:pr-3026
git checkout pr-3026

This pull request can be installed with:

pip install git+https://github.com/Pycord-Development/pycord@refs/pull/3026/head