Bump org.codehaus.mojo:flatten-maven-plugin from 1.7.2 to 1.7.3#546

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dependabot/maven/main/org.codehaus.mojo-flatten-maven-plugin-1.7.3spring-cloud/spring-cloud-build:dependabot/maven/main/org.codehaus.mojo-flatten-maven-plugin-1.7.3Copy head branch name to clipboard