Bump orjson from 3.9.7 to 3.9.15 in /.emacs.d/bin

Bumps [orjson](https://github.com/ijl/orjson) from 3.9.7 to 3.9.15.
- [Release notes](https://github.com/ijl/orjson/releases)
- [Changelog](https://github.com/ijl/orjson/blob/master/CHANGELOG.md)
- [Commits](ijl/orjson@3.9.7...3.9.15)

---
updated-dependencies:
- dependency-name: orjson
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

.emacs.d/bin/requirements.txt

@@ -1,5 +1,5 @@
 epc==0.0.5
-orjson==3.9.7
+orjson==3.9.15
 paramiko==3.4.0
 rapidfuzz==3.3.1
 sexpdata==1.0.1