chore(deps): bump cap-std from 4.0.2 to 4.0.3

Bumps [cap-std](https://github.com/bytecodealliance/cap-std) from 4.0.2 to 4.0.3.
- [Commits](sunfishcode/cap-std@cap-std-v4.0.2...cap-std-v4.0.3)

---
updated-dependencies:
- dependency-name: cap-std
  dependency-version: 4.0.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Cargo.lock

@@ -58,7 +58,7 @@ bytes = "1.12.1"
 
 # Capability-based filesystem access (TOCTOU-safe opens)
 cap-fs-ext = "=4.0.2"
-cap-std = "=4.0.2"
+cap-std = "=4.0.3"
 
 # Date/time and utilities
 chrono = { version = "0.4.45", features = ["serde"] }