Merge pull request #12 from viscom-ulm/dependabot/pip/backend/tensorflow-2.5.0

Bump tensorflow from 2.4.1 to 2.5.0 in /backend

Author: Alex Bäuerle

backend/requirements.txt

@@ -51,7 +51,7 @@ six==1.15.0
 structlog==21.1.0
 tensorboard==2.4.1
 tensorboard-plugin-wit==1.8.0
-tensorflow==2.4.1
+tensorflow==2.5.0
 tensorflow-estimator==2.4.0
 termcolor==1.1.0
 tinycss2==1.1.0