Update openpyxl requirement from ~=3.1.2 to ~=3.1.4 in /server

Updates the requirements on [openpyxl](https://openpyxl.readthedocs.io) to permit the latest version.

---
updated-dependencies:
- dependency-name: openpyxl
  dependency-type: direct:production
...

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

server/requirements.txt

@@ -18,7 +18,7 @@ lxml==5.2.*
 matplotlib==3.9.*
 numpy==1.26.*
 orjson==3.10.*
-openpyxl~=3.1.2
+openpyxl~=3.1.4
 Pillow==10.3.*
 pandas==2.1.*
 pdf2image==1.17.*