Bump openpyxl from 3.0.9 to 3.1.5

Bumps [openpyxl](https://openpyxl.readthedocs.io) from 3.0.9 to 3.1.5.

---
updated-dependencies:
- dependency-name: openpyxl
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -9,7 +9,7 @@ pyodbc==4.0.32
 pytest==6.2.5
 pytest-cov==3.0.0
 requests==2.26.0
-openpyxl==3.0.9
+openpyxl==3.1.5
 jupyterlab==3.4.5
 azure-keyvault==4.1.0
 azure-identity>=1.10.0, <2.0.0