[Snyk] Security upgrade org.springframework.boot:spring-boot-starter-security from 3.0.5 to 3.0.9 (#679)

<p>This PR was automatically created by Snyk using the credentials of a
real user.</p><br /><h3>Snyk has created this PR to fix one or more
vulnerable packages in the `maven` dependencies of this project.</h3>



#### Changes included in this PR

- Changes to the following files to upgrade the vulnerable dependencies
to a fixed version:
    - backend/pom.xml



#### Vulnerabilities that will be fixed
##### With an upgrade:
Severity | Priority Score (*) | Issue | Upgrade | Breaking Change |
Exploit Maturity | Reachability

:-------------------------:|-------------------------|:-------------------------|:-------------------------|:-------------------------|:-------------------------|:-------------------------
![high
severity](https://res.cloudinary.com/snyk/image/upload/w_20,h_20/v1561977819/icon/h.png
"high severity") | **575/1000** <br/> **Why?** Recently disclosed, Has a
fix available, CVSS 7.5 | Improper Authorization
<br/>[SNYK-JAVA-ORGSPRINGFRAMEWORKSECURITY-5777882](https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORKSECURITY-5777882)
| `org.springframework.boot:spring-boot-starter-security:` <br> `3.0.5
-> 3.0.9` <br> | No | No Known Exploit | No Path Found
![critical
severity](https://res.cloudinary.com/snyk/image/upload/w_20,h_20/v1561977819/icon/c.png
"critical severity") | **730/1000** <br/> **Why?** Proof of Concept
exploit, Recently disclosed, Has a fix available, CVSS 9.1 | Access
Control Bypass
<br/>[SNYK-JAVA-ORGSPRINGFRAMEWORKSECURITY-5777893](https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORKSECURITY-5777893)
| `org.springframework.boot:spring-boot-starter-security:` <br> `3.0.5
-> 3.0.9` <br> | No | Proof of Concept | No Path Found

(*) Note that the real score may have changed since the PR was raised.











Check the changes in this PR to ensure they won't cause issues with your
project.



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[//]: #
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---

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Author: thoomasbro

backend/pom.xml

@@ -16,7 +16,7 @@
 
 	<properties>
 		<java.version>17</java.version>
-		<spring.version>3.0.5</spring.version>
+		<spring.version>3.0.9</spring.version>
 		<kotlin.version>1.8.21</kotlin.version>
 		<testcontainers.version>1.17.6</testcontainers.version>
 		<commit.hash>COMMIT_TO_CHANGE</commit.hash>