chore(deps): bump github.com/gliderlabs/sigil in /plugins/nginx-vhosts

Bumps [github.com/gliderlabs/sigil](https://github.com/gliderlabs/sigil) from 0.12.0 to 0.12.1.
- [Release notes](https://github.com/gliderlabs/sigil/releases)
- [Commits](https://github.com/gliderlabs/sigil/compare/v0.12.0...v0.12.1)

---
updated-dependencies:
- dependency-name: github.com/gliderlabs/sigil
  dependency-version: 0.12.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

plugins/nginx-vhosts/go.mod

@@ -4,7 +4,7 @@ go 1.26.2
 
 require (
 	github.com/dokku/dokku/plugins/common v0.0.0-00010101000000-000000000000
-	github.com/gliderlabs/sigil v0.12.0
+	github.com/gliderlabs/sigil v0.12.1
 	github.com/spf13/pflag v1.0.10
 )