Bump flask-injector from 0.12.0 to 0.12.3 in /auctioning_platform

Bumps [flask-injector](https://github.com/alecthomas/flask_injector) from 0.12.0 to 0.12.3.
- [Release notes](https://github.com/alecthomas/flask_injector/releases)
- [Changelog](https://github.com/alecthomas/flask_injector/blob/master/CHANGELOG.rst)
- [Commits](python-injector/flask_injector@v0.12.0...v0.12.3)

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

Author: dependabot-preview[bot]

auctioning_platform/requirements.txt

@@ -17,7 +17,7 @@ email-validator==1.1.1    # via -r ./web_app/requirements.txt
 factory-boy==3.1.0        # via -r ./auctions/requirements-dev.txt, -r ./web_app/requirements-dev.txt, -r ./web_app/requirements.txt
 faker==4.14.0             # via -r ./shipping_infrastructure/requirements.txt, factory-boy, pytest-faker
 flask-babelex==0.9.4      # via flask-security
-flask-injector==0.12.0    # via -r ./web_app/requirements.txt
+flask-injector==0.12.3    # via -r ./web_app/requirements.txt
 flask-login==0.5.0        # via -r ./web_app/requirements.txt, flask-security
 flask-mail==0.9.1         # via flask-security
 flask-principal==0.4.0    # via flask-security

auctioning_platform/web_app/requirements.txt

@@ -1,7 +1,7 @@
 email-validator==1.1.1
 factory-boy==3.1.0
 Flask-Security==3.0.0
-Flask-Injector==0.12.0
+Flask-Injector==0.12.3
 Flask==1.1.2
 bcrypt==3.1.7
 marshmallow==3.10.0