Bump actions/artifact-download and -upload from v3 to v4

[sidey79]

• Please check if the PR fulfills these requirements
• [ ] Tests for the changes have been added / modified (needed for for bug fixes / features)
• [ ] commandref has been added / updated (needed for bug fixes / features)

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

• [ ] Bugfix (please link issue)

• [ ] Feature enhancement

• [ ] Documentation update

• [x] Unittest enhancement

• [ ] other

• What is the current behavior? (You can also link to an open issue here, if this describes the current behavior)

Update to artifacts v4 action needs changes in workflow code

• What is the new behavior (if this is a feature change)?

Artifacts action v4 is uses individual artifact name to store changed files updating the ID line

• Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)

No

• Other information:

Implements #1209 and #1211

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (1762fb2) 69.56% compared to head (d0d2285) 69.08%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1210 +/- ## ========================================== - Coverage 69.56% 69.08% -0.49% ========================================== Files 134 136 +2 Lines 10003 10025 +22 Branches 1596 1596 ========================================== - Hits 6959 6926 -33 - Misses 1723 1778 +55 Partials 1321 1321 ``` | [Flag](https://app.codecov.io/gh/RFD-FHEM/RFFHEM/pull/1210/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=RFD-FHEM) | Coverage Δ | | |---|---|---| | [fhem](https://app.codecov.io/gh/RFD-FHEM/RFFHEM/pull/1210/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=RFD-FHEM) | `59.20% <ø> (-0.54%)` | :arrow_down: | | [modules](https://app.codecov.io/gh/RFD-FHEM/RFFHEM/pull/1210/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=RFD-FHEM) | `69.08% <ø> (-0.49%)` | :arrow_down: | | [perl](https://app.codecov.io/gh/RFD-FHEM/RFFHEM/pull/1210/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=RFD-FHEM) | `89.75% <ø> (ø)` | | | [unittests](https://app.codecov.io/gh/RFD-FHEM/RFFHEM/pull/1210/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=RFD-FHEM) | `69.08% <ø> (-0.49%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=RFD-FHEM#carryforward-flags-in-the-pull-request-comment) to find out more.

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[sidey79]

@HomeAutoUser @elektron-bbs

Hier brauch ich noch eine Genehmigung :)

[sidey79]

@HomeAutoUser @elektron-bbs

Brauche hier mal ein Approve