Bump poi-scratchpad from 3.12 to 5.2.1 in /server

Bumps poi-scratchpad from 3.12 to 5.2.1.

---
updated-dependencies:
- dependency-name: org.apache.poi:poi-scratchpad
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

server/pom.xml

@@ -60,7 +60,7 @@
         <dependency>
             <groupId>org.apache.poi</groupId>
             <artifactId>poi-scratchpad</artifactId>
-            <version>3.17</version>
+            <version>5.2.1</version>
         </dependency>
         <dependency>
             <groupId>org.apache.poi</groupId>