cargo: bump once_cell from 1.19.0 to 1.20.0

Bumps [once_cell](https://github.com/matklad/once_cell) from 1.19.0 to 1.20.0.
- [Changelog](https://github.com/matklad/once_cell/blob/master/CHANGELOG.md)
- [Commits](matklad/once_cell@v1.19.0...v1.20.0)

---
updated-dependencies:
- dependency-name: once_cell
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Cargo.toml

@@ -14,7 +14,7 @@ console = "0.15"
 ctrlc = "3.4"
 log = "0.4"
 notify = "6.1.1"
-once_cell = "1.19"
+once_cell = "1.20"
 pretty_env_logger = "0.5"
 qmluic = { version = "=0.1.0", path = "lib" }
 serde_json = "1.0"

lib/Cargo.toml

@@ -8,7 +8,7 @@ license = "MIT"
 camino = "1.1.9"
 itertools = "0.13"
 log = "0.4"
-once_cell = "1.19"
+once_cell = "1.20"
 quick-xml = "0.36"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"