sdbus-cpp: security, bump expat

[mayeut]

Specify library name and version: sdbus-cpp/all

fix use of vulnerable version of expat, versions<2.6.2 have known vulnerabilites: #23277

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• I've read the contributing guidelines.
• I've used a recent Conan client version close to the currently deployed.
• I've tried at least one configuration locally with the conan-center hook activated.

[conan-center-bot]

Conan v1 pipeline ✔️

All green in build 3 (19ba5dcd74dd3b0919a017129b8774293ba7e8c5):

• sdbus-cpp/1.2.0:
  All packages built successfully! (All logs)

• sdbus-cpp/0.8.3:
  All packages built successfully! (All logs)

• sdbus-cpp/1.0.0:
  All packages built successfully! (All logs)

• sdbus-cpp/1.5.0:
  All packages built successfully! (All logs)

• sdbus-cpp/1.4.0:
  All packages built successfully! (All logs)

• sdbus-cpp/1.1.0:
  All packages built successfully! (All logs)

• sdbus-cpp/1.3.0:
  All packages built successfully! (All logs)

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Conan v2 pipeline ✔️

Note: Conan v2 builds are now mandatory. Please read our discussion about it.

All green in build 3 (19ba5dcd74dd3b0919a017129b8774293ba7e8c5):

• sdbus-cpp/1.5.0:
  All packages built successfully! (All logs)

• sdbus-cpp/1.2.0:
  All packages built successfully! (All logs)

• sdbus-cpp/1.1.0:
  All packages built successfully! (All logs)

• sdbus-cpp/1.0.0:
  All packages built successfully! (All logs)

• sdbus-cpp/0.8.3:
  All packages built successfully! (All logs)

• sdbus-cpp/1.4.0:
  All packages built successfully! (All logs)

• sdbus-cpp/1.3.0:
  All packages built successfully! (All logs)

[conan-center-bot]

This PR has been automatically merged due to Bump version or Bump dependencies label.
Read https://github.com/conan-io/conan-center-index/blob/master/docs/labels.md#bump-version to obtain more information.