chore(deps): update bufbuild/buf docker tag to v1.73.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
bufbuild/buf	final	minor	1.72.0 → 1.73.0

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Release Notes

bufbuild/buf (bufbuild/buf)

v1.73.0

Compare Source

• Fix buf format dropping comments next to commas or semicolons in message literals.
• Fix compilation failing to resolve symbols re-exported through import public when the
  re-exporting file also reaches those symbols through a non-public import.
• Fix LSP go to definition not resolving across files inside dependency and well-known-type
  files, and release workspaces when their last open file closes to free resources.
• Fix LSP finding only a subset of references to symbols declared in
  dependencies, including well-known types.
• Fix buf format non-idempotent trailing comment formatting.
• Update built-in Well-Known Types to Protobuf v35.1.
• Fix managed mode setting java_multiple_files on Edition 2024 files, which is not
  allowed and causes code generation to fail.

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