Fix dir not found handling

[qwerty287]

closes #5168

[codecov]

Codecov Report

❌ Patch coverage is 0% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 26.38%. Comparing base (68d690a) to head (31e8299).
⚠️ Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
server/forge/forgejo/forgejo.go	0.00%	4 Missing ⚠️
server/forge/gitea/gitea.go	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5533      +/-   ##
==========================================
- Coverage   26.43%   26.38%   -0.05%     
==========================================
  Files         405      405              
  Lines       28878    28943      +65     
==========================================
+ Hits         7633     7636       +3     
- Misses      20546    20607      +61     
- Partials      699      700       +1     

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[anbraten]

Would this work for Gitlab, Github and the others as well?

[xoxys]

Already done on other forges https://github.com/woodpecker-ci/woodpecker/blob/main/server%2Fforge%2Fgithub%2Fgithub.go#L258