gha: update actions/checkout@v4, actions/setup-go@v5

[thaJeztah]

No description provided.

[thaJeztah]

Test-run can be seen in my fork;

• test update actions thaJeztah/netlink#1

cc @aboch @vishvananda ptal

[thaJeztah]

@aboch PTAL 🙏 (trying to get actions updated to add linting)

[thaJeztah]

@aboch PTAL

[adrianchiris]

@thaJeztah please squash to a single commit and we can merge this one.

[thaJeztah]

I kept these as separate commits as they were updating different actions, but let me know if that's a problem.

[adrianchiris]

currently the guidelines are single commit per PR. please squash :)

[adrianchiris]

@thaJeztah mind squasing to a single commit so we can merge this one ?

have created #1126 just to get this over the line in case you are not around or have time.