access_service_tokens: add method for refreshing tokens instead of replacing

[jacobbednarz]

Allows bumping a service token instead of fully replacing and needing to update everywhere.

[github-actions]

changelog detected ✅

[codecov-commenter]

Codecov Report

Merging #1074 (a04477e) into master (e39278e) will increase coverage by 0.09%.
The diff coverage is 69.87%.

@@            Coverage Diff             @@
##           master    #1074      +/-   ##
==========================================
+ Coverage   49.94%   50.04%   +0.09%     
==========================================
  Files         115      117       +2     
  Lines       10991    11085      +94     
==========================================
+ Hits         5490     5548      +58     
- Misses       4338     4362      +24     
- Partials     1163     1175      +12     

Impacted Files	Coverage Δ
pages_project.go	50.81% <ø> (ø)
stream.go	64.91% <ø> (ø)
teams_accounts.go	53.84% <ø> (ø)
access_service_tokens.go	66.29% <53.84%> (-2.13%)	⬇️
api_shield.go	53.84% <53.84%> (ø)
workers.go	69.38% <72.72%> (-0.04%)	⬇️
cloudflare.go	68.42% <93.75%> (+1.21%)	⬆️
email_routing_settings.go	60.00% <100.00%> (ø)
images.go	50.34% <100.00%> (-0.35%)	⬇️
r2_bucket.go	100.00% <100.00%> (ø)
... and 4 more

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[github-actions]

This functionality has been released in v0.49.0.

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