chore(deps): bump gorm.io/gorm from 1.25.5 to 1.25.6 in /backend

Bumps [gorm.io/gorm](https://github.com/go-gorm/gorm) from 1.25.5 to 1.25.6.
- [Release notes](https://github.com/go-gorm/gorm/releases)
- [Commits](go-gorm/gorm@v1.25.5...v1.25.6)

---
updated-dependencies:
- dependency-name: gorm.io/gorm
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

backend/go.mod

@@ -7,7 +7,7 @@ require (
 	github.com/go-faker/faker/v4 v4.2.0
 	github.com/golang-jwt/jwt v3.2.2+incompatible
 	gorm.io/datatypes v1.2.0
-	gorm.io/gorm v1.25.5
+	gorm.io/gorm v1.25.6
 )
 
 require (

backend/go.sum

@@ -139,7 +139,7 @@ gorm.io/driver/sqlite v1.4.3/go.mod h1:0Aq3iPO+v9ZKbcdiz8gLWRw5VOPcBOPUQJFLq5e2e
 gorm.io/driver/sqlserver v1.4.1 h1:t4r4r6Jam5E6ejqP7N82qAJIJAht27EGT41HyPfXRw0=
 gorm.io/driver/sqlserver v1.4.1/go.mod h1:DJ4P+MeZbc5rvY58PnmN1Lnyvb5gw5NPzGshHDnJLig=
 gorm.io/gorm v1.23.8/go.mod h1:l2lP/RyAtc1ynaTjFksBde/O8v9oOGIApu2/xRitmZk=
-gorm.io/gorm v1.25.5 h1:zR9lOiiYf09VNh5Q1gphfyia1JpiClIWG9hQaxB/mls=
-gorm.io/gorm v1.25.5/go.mod h1:hbnx/Oo0ChWMn1BIhpy1oYozzpM15i4YPuHDmfYtwg8=
+gorm.io/gorm v1.25.6 h1:V92+vVda1wEISSOMtodHVRcUIOPYa2tgQtyF+DfFx+A=
+gorm.io/gorm v1.25.6/go.mod h1:hbnx/Oo0ChWMn1BIhpy1oYozzpM15i4YPuHDmfYtwg8=
 nullprogram.com/x/optparse v1.0.0/go.mod h1:KdyPE+Igbe0jQUrVfMqDMeJQIJZEuyV7pjYmp6pbG50=
 rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4=