[Snyk] Security upgrade golang from 1.21rc3-alpine to 1.21.0-alpine

[wubin1989]

This PR was automatically created by Snyk using the credentials of a real user.

Keeping your Docker base image up-to-date means you’ll benefit from security fixes in the latest version of your chosen image.

Changes included in this PR

• cmd/testdata/testsvc/Dockerfile

We recommend upgrading to golang:1.21.0-alpine, as this image has only 0 known vulnerabilities. To do this, merge this pull request, then verify your application still works as expected.

Some of the most important vulnerabilities in your base image include:

Severity	Priority Score / 1000	Issue	Exploit Maturity
	514	Improper Authentication SNYK-ALPINE318-OPENSSL-5776808	No Known Exploit
	514	Improper Authentication SNYK-ALPINE318-OPENSSL-5776808	No Known Exploit
	514	Inefficient Regular Expression Complexity SNYK-ALPINE318-OPENSSL-5788370	No Known Exploit
	514	Inefficient Regular Expression Complexity SNYK-ALPINE318-OPENSSL-5788370	No Known Exploit
	514	Excessive Iteration SNYK-ALPINE318-OPENSSL-5821142	No Known Exploit

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[codecov[bot]]

Codecov Report

Merging #173 (fe1c74f) into main (41ef70f) will increase coverage by 0.03%. The diff coverage is n/a.

:exclamation: Current head fe1c74f differs from pull request most recent head e6dbcf1. Consider uploading reports for the commit e6dbcf1 to get more accurate results

@@            Coverage Diff             @@
##             main     #173      +/-   ##
==========================================
+ Coverage   48.99%   49.02%   +0.03%     
==========================================
  Files         112      112              
  Lines       12111    12111              
==========================================
+ Hits         5934     5938       +4     
+ Misses       5779     5777       -2     
+ Partials      398      396       -2     

see 2 files with indirect coverage changes

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