[Snyk] Security upgrade org.webjars:bootstrap from 3.3.6 to 5.3.3

[michaelhyatt]

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


Snyk has created this PR to fix 2 vulnerabilities in the maven dependencies of this project.

Snyk changed the following file(s):

• docker/petclinic/pom.xml

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score	Upgrade
	Cross-site Scripting SNYK-JAVA-ORGWEBJARS-7444596	570	org.webjars:bootstrap: 3.3.6 -> 5.3.3 No Path Found Proof of Concept
	Cross-site Scripting SNYK-JAVA-ORGWEBJARS-7444620	570	org.webjars:bootstrap: 3.3.6 -> 5.3.3 Major version upgrade No Path Found Proof of Concept

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[!IMPORTANT]

• Check the changes in this PR to ensure they won't cause issues with your project.
• Max score is 1000. Note that the real score may have changed since the PR was raised.
• This PR was automatically created by Snyk using the credentials of a real user.

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