feat(config): use 1.0.0.1 when 1.1.1.1 is blocked

[favonia]

No description provided.

[codecov]

Codecov Report

Merging #491 (ea85bda) into main (0cc67e0) will decrease coverage by 0.06%.
The diff coverage is 97.84%.

@@            Coverage Diff             @@
##             main     #491      +/-   ##
==========================================
- Coverage   87.82%   87.76%   -0.06%     
==========================================
  Files          35       41       +6     
  Lines        2095     2134      +39     
==========================================
+ Hits         1840     1873      +33     
- Misses        247      252       +5     
- Partials        8        9       +1     

Flag	Coverage Δ
unittests	87.76% <97.84%> (-0.06%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
cmd/ddns/ddns.go	0.00% <0.00%> (ø)
internal/config/env_base.go	100.00% <ø> (ø)
internal/config/network_probe.go	80.76% <80.76%> (ø)
internal/config/config.go	100.00% <100.00%> (ø)
internal/config/config_print.go	100.00% <100.00%> (ø)
internal/config/config_read.go	100.00% <100.00%> (ø)
internal/config/env_auth.go	100.00% <100.00%> (ø)
internal/config/env_domain.go	100.00% <100.00%> (ø)
internal/config/env_provider.go	100.00% <100.00%> (ø)
internal/provider/cloudflare_doh.go	100.00% <100.00%> (ø)
... and 2 more

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