build: bump github.com/cyphar/filepath-securejoin from 0.6.0 to 0.6.1

Bumps [github.com/cyphar/filepath-securejoin](https://github.com/cyphar/filepath-securejoin) from 0.6.0 to 0.6.1.
- [Release notes](https://github.com/cyphar/filepath-securejoin/releases)
- [Changelog](https://github.com/cyphar/filepath-securejoin/blob/main/CHANGELOG.md)
- [Commits](cyphar/filepath-securejoin@v0.6.0...v0.6.1)

---
updated-dependencies:
- dependency-name: github.com/cyphar/filepath-securejoin
  dependency-version: 0.6.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

go.mod

@@ -4,7 +4,7 @@ module github.com/go-git/go-billy/v6
 go 1.24.0
 
 require (
-	github.com/cyphar/filepath-securejoin v0.6.0
+	github.com/cyphar/filepath-securejoin v0.6.1
 	github.com/stretchr/testify v1.11.1
 	golang.org/x/sys v0.38.0
 )

go.sum

@@ -1,5 +1,5 @@
-github.com/cyphar/filepath-securejoin v0.6.0 h1:BtGB77njd6SVO6VztOHfPxKitJvd/VPT+OFBFMOi1Is=
-github.com/cyphar/filepath-securejoin v0.6.0/go.mod h1:A8hd4EnAeyujCJRrICiOWqjS1AX0a9kM5XL+NwKoYSc=
+github.com/cyphar/filepath-securejoin v0.6.1 h1:5CeZ1jPXEiYt3+Z6zqprSAgSWiggmpVyciv8syjIpVE=
+github.com/cyphar/filepath-securejoin v0.6.1/go.mod h1:A8hd4EnAeyujCJRrICiOWqjS1AX0a9kM5XL+NwKoYSc=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=