build(deps): bump sqlparse from 0.5.2 to 0.5.3 in /backend

Bumps [sqlparse](https://github.com/andialbrecht/sqlparse) from 0.5.2 to 0.5.3.
- [Release notes](https://github.com/andialbrecht/sqlparse/releases)
- [Changelog](https://github.com/andialbrecht/sqlparse/blob/master/CHANGELOG)
- [Commits](andialbrecht/sqlparse@0.5.2...0.5.3)

---
updated-dependencies:
- dependency-name: sqlparse
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

backend/Pipfile

@@ -44,7 +44,7 @@ sentry-sdk = "~=2.19"
 simplejson = "~=3.19"
 sphinx-jsonschema = "~=1.17"
 sqlalchemy = "~=1.4"
-sqlparse = "~=0.5.2"
+sqlparse = "~=0.5.3"
 tqdm = "~=4.67"
 vcfpy = "~=0.13.8"
 wrapt = "~=1.16"