feat(shoutrr): update to v0.5

[piksel]

release notes: https://github.com/containrrr/shoutrrr/releases/tag/v0.5.0

[codecov]

Codecov Report

Merging #1055 (d85175b) into main (bd74c05) will increase coverage by 0.00%.
The diff coverage is 70.00%.

@@           Coverage Diff           @@
##             main    #1055   +/-   ##
=======================================
  Coverage   59.68%   59.68%           
=======================================
  Files          22       22           
  Lines        1414     1419    +5     
=======================================
+ Hits          844      847    +3     
- Misses        500      501    +1     
- Partials       70       71    +1     

Impacted Files	Coverage Δ
pkg/notifications/notifier.go	69.56% <0.00%> (ø)
pkg/notifications/slack.go	94.87% <77.77%> (-5.13%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update bd74c05...d85175b. Read the comment docs.

[silex-alexis]

thanks a lot for this! our MS-Teams notifications are broken since August 6th and we need shoutrr v0.5 fix of issue shoutrr#187 to restore them :)