Bump golang.org/x/oauth2 from 0.25.0 to 0.28.0

Bumps [golang.org/x/oauth2](https://github.com/golang/oauth2) from 0.25.0 to 0.28.0.
- [Commits](golang/oauth2@v0.25.0...v0.28.0)

---
updated-dependencies:
- dependency-name: golang.org/x/oauth2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

go.mod

@@ -1,14 +1,13 @@
 module github.com/vultr/docker-machine-driver-vultr
 
 go 1.23
-
 toolchain go1.23.5
 
 require (
 	github.com/docker/machine v0.16.2
 	github.com/rancher/machine v0.16.2
 	github.com/vultr/govultr/v3 v3.14.1
-	golang.org/x/oauth2 v0.25.0
+	golang.org/x/oauth2 v0.28.0
 )
 
 require (

go.sum

@@ -38,8 +38,8 @@ github.com/vultr/govultr/v3 v3.14.1 h1:9BpyZgsWasuNoR39YVMcq44MSaF576Z4D+U3ro58e
 github.com/vultr/govultr/v3 v3.14.1/go.mod h1:q34Wd76upKmf+vxFMgaNMH3A8BbsPBmSYZUGC8oZa5w=
 golang.org/x/crypto v0.32.0 h1:euUpcYgM8WcP71gNpTqQCn6rC2t6ULUPiOzfWaXVVfc=
 golang.org/x/crypto v0.32.0/go.mod h1:ZnnJkOaASj8g0AjIduWNlq2NRxL0PlBrbKVyZ6V/Ugc=
-golang.org/x/oauth2 v0.25.0 h1:CY4y7XT9v0cRI9oupztF8AgiIu99L/ksR/Xp/6jrZ70=
-golang.org/x/oauth2 v0.25.0/go.mod h1:XYTD2NtWslqkgxebSiOHnXEap4TF09sJSc7H1sXbhtI=
+golang.org/x/oauth2 v0.28.0 h1:CrgCKl8PPAVtLnU3c+EDw6x11699EWlsDeWNWKdIOkc=
+golang.org/x/oauth2 v0.28.0/go.mod h1:onh5ek6nERTohokkhCD/y2cV4Do3fxFHFuAejCkRWT8=
 golang.org/x/sys v0.0.0-20210616094352-59db8d763f22/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.29.0 h1:TPYlXGxvx1MGTn2GiZDhnjPA9wZzZeGKHHmKhHYvgaU=
 golang.org/x/sys v0.29.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=