Bump gdbstub from 0.7.5 to 0.7.6 (#610)

Bumps [gdbstub](https://github.com/daniel5151/gdbstub) from 0.7.5 to 0.7.6.
- [Release notes](https://github.com/daniel5151/gdbstub/releases)
- [Changelog](https://github.com/daniel5151/gdbstub/blob/master/CHANGELOG.md)
- [Commits](daniel5151/gdbstub@0.7.5...0.7.6)

---
updated-dependencies:
- dependency-name: gdbstub
  dependency-version: 0.7.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Cargo.lock

@@ -67,7 +67,7 @@ windows-version = "0.1"
 lazy_static = "1.4.0"
 
 [target.'cfg(unix)'.dependencies]
-gdbstub = { version = "0.7.5", optional = true }
+gdbstub = { version = "0.7.6", optional = true }
 gdbstub_arch = { version = "0.3.2", optional = true }
 seccompiler = { version = "0.5.0", optional = true }
 kvm-bindings = { version = "0.12", features = ["fam-wrappers"], optional = true }