build(deps): update meson requirement from ~=1.4.0 to ~=1.6.1

Updates the requirements on [meson](https://github.com/mesonbuild/meson) to permit the latest version.
- [Release notes](https://github.com/mesonbuild/meson/releases)
- [Commits](mesonbuild/meson@1.4.0...1.6.1)

---
updated-dependencies:
- dependency-name: meson
  dependency-type: direct:production
...

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

requirements.txt

@@ -1,7 +1,7 @@
 # SPDX-FileCopyrightText: 2023-2024 Ledger SAS
 # SPDX-License-Identifier: Apache-2.0
 
-meson~=1.4.0
+meson~=1.6.1
 ninja
 kconfiglib~=14.1.0
 sphinx_rtd_theme