Regenerate securitycenter client

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Here's the log from Synthtool:

synthtool > Executing /tmpfs/src/git/autosynth/working_repo/google-cloud-clients/google-cloud-securitycenter/synth.py.
synthtool > Ensuring dependencies.
synthtool > Pulling artman image.
latest: Pulling from googleapis/artman
Digest: sha256:f1a2e851e5e012c59e1da4125480bb19878f86a4e7fac4f375f2e819956b5aa3
Status: Image is up to date for googleapis/artman:latest
synthtool > Cloning googleapis.
synthtool > Running generator for google/cloud/securitycenter/artman_securitycenter_v1beta1.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/java.
synthtool > Running java formatter on 20 files
synthtool > Running java formatter on 1 files
synthtool > Running java formatter on 67 files
synthtool > Running generator for google/cloud/securitycenter/artman_securitycenter_v1.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/java.
synthtool > Running java formatter on 20 files
synthtool > Running java formatter on 1 files
synthtool > Running java formatter on 72 files
synthtool > Cleaned up 0 temporary directories.
synthtool > Wrote metadata to synth.metadata.

[codecov]

Codecov Report

Merging #5779 into master will not change coverage.
The diff coverage is 100%.

@@ Coverage Diff @@## master #5779 +/- ##
=========================================
Coverage 47.17% 47.17% Complexity 25130 25130 =========================================
Files 2389 2389 Lines 259836 259836 Branches 29417 29417 =========================================
Hits 122585 122585 Misses 128321 128321 Partials 8930 8930

Impacted Files	Coverage Δ	Complexity Δ
...enter/v1beta1/stub/SecurityCenterStubSettings.java	76.64% <100%> (ø)	29 <0> (ø)	⬇️
...ritycenter/v1/stub/SecurityCenterStubSettings.java	76.64% <100%> (ø)	29 <0> (ø)	⬇️

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