ci: Bump actions artifacts from 3 to 4

[philipphofmann]

Bumps actions/download-artifact from 3 to 4 and actions/upload-artifact from 3 to 4.

No migration changes required after looking at the migration guide because our artifacts of jobs using matrixes already reflect the matrix parameters in their names.

#skip-changelog

[codecov]

Codecov Report

Merging #3515 (351e24d) into main (fac579e) will decrease coverage by 0.025%.
Report is 1 commits behind head on main.
The diff coverage is n/a.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #3515       +/-   ##
=============================================
- Coverage   89.205%   89.181%   -0.025%     
=============================================
  Files          528       528               
  Lines        57476     57475        -1     
  Branches     20608     20609        +1     
=============================================
- Hits         51272     51257       -15     
+ Misses        5294      5189      -105     
- Partials       910      1029      +119     

see 43 files with indirect coverage changes

---

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[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1199.20 ms	1224.31 ms	25.11 ms
Size	21.58 KiB	418.33 KiB	396.75 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
b483671	1217.20 ms	1236.82 ms	19.62 ms
e758449	1243.41 ms	1246.71 ms	3.31 ms
db31083	1227.69 ms	1243.56 ms	15.87 ms
279841c	1231.41 ms	1245.65 ms	14.24 ms
7bb0873	1226.18 ms	1247.30 ms	21.12 ms
4886e79	1248.43 ms	1255.04 ms	6.61 ms
afd1a08	1207.78 ms	1223.44 ms	15.66 ms
983de17	1260.57 ms	1263.68 ms	3.11 ms
b9b0f0a	1235.61 ms	1237.40 ms	1.79 ms
ff09c7e	1244.86 ms	1246.68 ms	1.82 ms

App size

Revision	Plain	With Sentry	Diff
b483671	20.76 KiB	434.72 KiB	413.96 KiB
e758449	22.85 KiB	407.62 KiB	384.77 KiB
db31083	22.85 KiB	407.63 KiB	384.78 KiB
279841c	22.84 KiB	403.19 KiB	380.35 KiB
7bb0873	22.85 KiB	407.09 KiB	384.24 KiB
4886e79	22.85 KiB	412.98 KiB	390.13 KiB
afd1a08	22.84 KiB	402.57 KiB	379.72 KiB
983de17	22.84 KiB	403.19 KiB	380.34 KiB
b9b0f0a	20.76 KiB	434.93 KiB	414.17 KiB
ff09c7e	20.76 KiB	427.77 KiB	407.00 KiB

[philipphofmann]

@brustolin, I guess you missed this one ⬆️.