[Snyk] Security upgrade jekyll-sitemap from 0.11.0 to 0.12.0#23

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snyk-fix-3e7a81028fe4bd2d097eb5f65226ed6d

Commits on Jul 8, 2021

fix: jhipster/jhipster-microservice/gateway-app/src/main/webapp/bower_components/bootstrap/Gemfile to reduce vulnerabilities
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