Bump handlebars from 5.1.2 to 6.0.0

Bumps [handlebars](https://github.com/sunng87/handlebars-rust) from 5.1.2 to 6.0.0.
- [Release notes](https://github.com/sunng87/handlebars-rust/releases)
- [Changelog](https://github.com/sunng87/handlebars-rust/blob/master/CHANGELOG.md)
- [Commits](sunng87/handlebars-rust@v5.1.2...v6.0.0)

---
updated-dependencies:
- dependency-name: handlebars
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

Cargo.lock

@@ -9,5 +9,5 @@ josh = { path = "../josh-core" }
 josh-graphql = { path = "../josh-graphql" }
 juniper = { workspace = true }
 serde_json = { workspace = true }
-handlebars = "5.1.2"
+handlebars = "6.0.0"
 form_urlencoded = "1.2.1"