Bump org.webjars:bootstrap in /spring-petclinic-api-gateway

Bumps [org.webjars:bootstrap](https://github.com/webjars/bootstrap) from 3.4.0 to 5.0.0.
- [Commits](webjars/bootstrap@bootstrap-3.4.0...bootstrap-5.0.0)

---
updated-dependencies:
- dependency-name: org.webjars:bootstrap
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

spring-petclinic-api-gateway/pom.xml

@@ -16,7 +16,7 @@
 
     <properties>
         <!-- Any bootstrap version upgrade must be reported in the wro4j.xml file -->
-        <webjars-bootstrap.version>3.4.0</webjars-bootstrap.version>
+        <webjars-bootstrap.version>5.0.0</webjars-bootstrap.version>
         <webjars-jquery.version>3.6.0</webjars-jquery.version>
         <webjars-angular.version>1.8.2</webjars-angular.version>
         <webjars-angular-ui-router.version>1.0.20</webjars-angular-ui-router.version>