Bump pillow from 10.2.0 to 10.3.0 in /app/backend (#1486)

Bumps [pillow](https://github.com/python-pillow/Pillow) from 10.2.0 to 10.3.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@10.2.0...10.3.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

app/backend/requirements.txt

@@ -274,7 +274,7 @@ pandas==2.2.1
     # via openai
 pandas-stubs==2.2.0.240218
     # via openai
-pillow==10.2.0
+pillow==10.3.0
     # via -r requirements.in
 portalocker==2.8.2
     # via msal-extensions
@@ -291,7 +291,9 @@ pydantic==2.6.3
 pydantic-core==2.16.3
     # via pydantic
 pyjwt[crypto]==2.8.0
-    # via msal
+    # via
+    #   msal
+    #   pyjwt
 pymupdf==1.23.26
     # via -r requirements.in
 pymupdfb==1.23.22