fix: restore zip_release — the HACS asset URL was never actually broken

Revert of caf6e6c3. The owner's field report disproved the diagnosis: HACS
2.0.5 downloads zip_release assets fine, because async_download_file strips
the 'tags/' prefix from the composed URL before requesting (hacs/base.py) —
the prefix only survives in the error-log message, which prints the
unnormalized URL. The dacha installed every beta and v1.68.0 through HACS
with zip_release active. The observed 'Failed to download' was a transient
network failure fetching release-assets.githubusercontent.com (five retries
exhausted, one occurrence), not a routing bug.

Issue: #325
User-Visible: no
(cherry picked from commit 5ad0c1cdc3)

hacs.json

@@ -1,5 +1,7 @@
 {
   "name": "House Plan (card + storage)",
   "render_readme": true,
-  "homeassistant": "2024.6.0"
+  "homeassistant": "2024.6.0",
+  "zip_release": true,
+  "filename": "houseplan.zip"
 }