[release] Bumped to release 9.7.3

[Aryamanz29]

9.7.3 (May 25, 2026)

New Features

• skillArtifactContent attribute on SkillArtifact: Adds the skill_artifact_content (skillArtifactContent) field to SkillArtifact in both pyatlan and pyatlan_v9. The Atlas API returns this attribute on SkillArtifact entities but PyAtlan was silently dropping it. This unblocks surfacing skill .md body content via get_asset / search_assets without needing a raw HTTP fallback. (feat: add skillArtifactContent to SkillArtifact model #937)

Bug Fixes

• Connection.creator validates connector_type slug (BLDX-1294): Connection.creator and Connection.creator_async (both pyatlan and pyatlan_v9) now validate connector_type.value against ^[a-z0-9-]+$ — the same pattern the Atlan platform's server-side asset-import (RAB) path enforces. Raises InvalidRequestError (ATLAN-PYTHON-400-079) on violation. Mirrors the Java SDK constraint. (fix(connection): reject connector_type values that violate platform slug pattern (BLDX-1294) #939)

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