chore(deps): bump github.com/go-playground/validator/v10 in /backend

Bumps [github.com/go-playground/validator/v10](https://github.com/go-playground/validator) from 10.14.1 to 10.15.0.
- [Release notes](https://github.com/go-playground/validator/releases)
- [Commits](go-playground/validator@v10.14.1...v10.15.0)

---
updated-dependencies:
- dependency-name: github.com/go-playground/validator/v10
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

backend/go.mod

@@ -5,7 +5,7 @@ go 1.20
 require (
 	github.com/brianvoe/gofakeit/v6 v6.23.1
 	github.com/fatih/structs v1.1.0
-	github.com/go-playground/validator/v10 v10.14.1
+	github.com/go-playground/validator/v10 v10.15.0
 	github.com/go-sql-driver/mysql v1.7.1
 	github.com/go-testfixtures/testfixtures/v3 v3.9.0
 	github.com/go-webauthn/webauthn v0.8.2

backend/go.sum

@@ -139,8 +139,8 @@ github.com/go-playground/locales v0.14.1 h1:EWaQ/wswjilfKLTECiXz7Rh+3BjFhfDFKv/o
 github.com/go-playground/locales v0.14.1/go.mod h1:hxrqLVvrK65+Rwrd5Fc6F2O76J/NuW9t0sjnWqG1slY=
 github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJnYK9S473LQFuzCbDbfSFY=
 github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY=
-github.com/go-playground/validator/v10 v10.14.1 h1:9c50NUPC30zyuKprjL3vNZ0m5oG+jU0zvx4AqHGnv4k=
-github.com/go-playground/validator/v10 v10.14.1/go.mod h1:9iXMNT7sEkjXb0I+enO7QXmzG6QCsPWY4zveKFVRSyU=
+github.com/go-playground/validator/v10 v10.15.0 h1:nDU5XeOKtB3GEa+uB7GNYwhVKsgjAR7VgKoNB6ryXfw=
+github.com/go-playground/validator/v10 v10.15.0/go.mod h1:9iXMNT7sEkjXb0I+enO7QXmzG6QCsPWY4zveKFVRSyU=
 github.com/go-sql-driver/mysql v1.6.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
 github.com/go-sql-driver/mysql v1.7.0/go.mod h1:OXbVy3sEdcQ2Doequ6Z5BW6fXNQTmx+9S1MCJN5yJMI=
 github.com/go-sql-driver/mysql v1.7.1 h1:lUIinVbN1DY0xBg0eMOzmmtGoHwWBbvnWubQUrtU8EI=