[25.12] mesh11sd: update to version 7.3.0 - #1202

Checking PR #1202: mesh11sd: update to version 7.3.0 (Makefile Audit)

Commit 4e04ef0 - mesh11sd: update to version 7.3.0:

✅ PKG_VERSION bump matches context information inside subject line (7.3.0)
✅ PKG_LICENSE uses no deprecated or informal SPDX identifiers
✅ Makefile does not assign per-package variables at the top level
✅ Makefile contains valid assignment operators and no spaces after ':='
✅ Makefile blocks contain valid indentation (spaces for metadata/description, tabs for build/install recipes)
✅ No feed package forces its own inclusion into buildbot default images via DEFAULT+BUILDBOT
✅ Makefile does not reuse PKG_NAME in call, define, or eval lines
✅ File additions contain clean UNIX (LF) line termination
✅ All modified files contain a trailing newline

Package Release Audit:

✅ Package mesh11sd version updated to '7.3.0' and PKG_RELEASE correctly reset to 1

Package Hash Audit:

✅ Package Makefile 'mesh11sd/Makefile' updates the source checksum together with the version