ci(desktop): record the rpm legs in the workflow size baseline

`desktop-release.yml` is now 49858 bytes, past its recorded 45089 plus the
4096 allowance, so `Lint & Static` fails on the ratchet before any linter runs.
The growth is the two rpm legs: their matrix entries, the per-leg overlay
wiring, and the roots' comments. Moving that prose out would not pay for it —
the legs themselves are the bytes — so the number moves with the file in the
same PR, as the gate asks.

Co-authored-by: Qwen-Coder <[email protected]>
Patrol-Run: qwen-pr-closeout/jmvy1jgjo76

.github/workflows/.size-baseline

@@ -23,7 +23,7 @@
 4193 codeql.yml
 9389 comment-attachment-guard.yml
 2090 desktop-packaging-check.yml
-45089 desktop-release.yml
+49858 desktop-release.yml
 2038 docs-page-action.yml
 10005 dsw-swe-verified-release.yml
 40188 e2e.yml