Bump scipy from 1.6.3 to 1.7.3

Bumps [scipy](https://github.com/scipy/scipy) from 1.6.3 to 1.7.3.
- [Release notes](https://github.com/scipy/scipy/releases)
- [Commits](scipy/scipy@v1.6.3...v1.7.3)

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

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

requirements.txt

@@ -13,7 +13,7 @@ awscli
 # Pinned dependencies to help pip
 sqlparse==0.4.2
 spglib==1.16.1
-scipy==1.6.3
+scipy==1.7.3
 
 # Temporary qmpy3 dependency
 qmpy-tri>=2021.6.11