chore(deps): bump github.com/casbin/casbin/v2 from 2.85.0 to 2.88.0

Bumps [github.com/casbin/casbin/v2](https://github.com/casbin/casbin) from 2.85.0 to 2.88.0.
- [Release notes](https://github.com/casbin/casbin/releases)
- [Changelog](https://github.com/casbin/casbin/blob/master/.releaserc.json)
- [Commits](casbin/casbin@v2.85.0...v2.88.0)

---
updated-dependencies:
- dependency-name: github.com/casbin/casbin/v2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

go.mod

@@ -3,7 +3,7 @@ module github.com/gin-contrib/authz
 go 1.20
 
 require (
-	github.com/casbin/casbin/v2 v2.85.0
+	github.com/casbin/casbin/v2 v2.88.0
 	github.com/gin-gonic/gin v1.9.1
 )
 

go.sum

@@ -2,8 +2,8 @@ github.com/bytedance/sonic v1.5.0/go.mod h1:ED5hyg4y6t3/9Ku1R6dU/4KyJ48DZ4jPhfY1
 github.com/bytedance/sonic v1.10.0-rc/go.mod h1:ElCzW+ufi8qKqNW0FY314xriJhyJhuoJ3gFZdAHF7NM=
 github.com/bytedance/sonic v1.11.3 h1:jRN+yEjakWh8aK5FzrciUHG8OFXK+4/KrAX/ysEtHAA=
 github.com/bytedance/sonic v1.11.3/go.mod h1:iZcSUejdk5aukTND/Eu/ivjQuEL0Cu9/rf50Hi0u/g4=
-github.com/casbin/casbin/v2 v2.85.0 h1:VajW9GR/T0fp3SND183gneZGIAdYtl9C7bDYBrqQiGg=
-github.com/casbin/casbin/v2 v2.85.0/go.mod h1:jX8uoN4veP85O/n2674r2qtfSXI6myvxW85f6TH50fw=
+github.com/casbin/casbin/v2 v2.88.0 h1:JFHId/aIFvNvPnTwUP+tTtVAjSh3eidslFzy+5LpSeU=
+github.com/casbin/casbin/v2 v2.88.0/go.mod h1:jX8uoN4veP85O/n2674r2qtfSXI6myvxW85f6TH50fw=
 github.com/casbin/govaluate v1.1.0/go.mod h1:G/UnbIjZk/0uMNaLwZZmFQrR72tYRZWQkO70si/iR7A=
 github.com/casbin/govaluate v1.1.1 h1:J1rFKIBhiC5xr0APd5HP6rDL+xt+BRoyq1pa4o2i/5c=
 github.com/casbin/govaluate v1.1.1/go.mod h1:G/UnbIjZk/0uMNaLwZZmFQrR72tYRZWQkO70si/iR7A=