Upgrade Spring Boot version to address many security vulnerabilities (#52)

Fixes #28 ([CVE-2024-38809](https://spring.io/security/cve-2024-38809)), #29 ([CVE-2024-38816](https://spring.io/security/cve-2024-38816)), and #46 ([CVE-2024-38820](https://spring.io/security/cve-2024-38820))

Chose to stay on the 3.2 Spring Boot train despite 3.4 being out. Waiting for a more conscious to do the upgrade in case there are other changes required.

Luckily none of the preconditions of the vulnerabilities were true for SciPro so they could not be exploited.

Reviewed-on: #52
Reviewed-by: Tom Zhao <tom.zhao@dsv.su.se>
Co-authored-by: Andreas Svanberg <andreass@dsv.su.se>
Co-committed-by: Andreas Svanberg <andreass@dsv.su.se>

pom.xml

@@ -101,7 +101,7 @@
             <dependency>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-dependencies</artifactId>
-                <version>3.2.5</version>
+                <version>3.2.12</version>
                 <scope>import</scope>
                 <type>pom</type>
             </dependency>