Update aether to 4.29.6

Synced from the AUR at 04592d5. Two upstream releases land together: 4.29.5
hardened the aether protocol imports and moved the repository links from
bjarneo to omacom-io, which is why the url and every source line change here
as well; 4.29.6 disables WebView GPU acceleration on Linux. The packaging
itself is untouched between the two -- only pkgver and the checksums differ --
so taking HEAD rather than pinning 4.29.5 costs nothing and carries the
hardening either way.

aether is fast ring, so this reaches stable without an edge-to-stable
migration once it is built for that mirror.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

pkgbuilds/aether/.omarchy/package.json

@@ -1,5 +1,5 @@
 {
   "source": "aur",
   "release_ring": "fast",
-  "upstream_commit": "2cc2e0ccfbc9a3da658236006992244cd68ba985"
+  "upstream_commit": "04592d5713f9c09ea2d81cf4b8476714d80014bc"
 }