Update website for version 8.0.4 (#297)

This pull request updates the downloads page of the valkey website with
the new release 8.0.4.
Please review the changes and merge when appropriate.

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: madolson

content/download/releases/v8-0-4.md

@@ -0,0 +1,31 @@
+---
+title: "8.0.4"
+date: 2025-07-07
+extra:
+    tag: "8.0.4"
+    artifact_source: https://download.valkey.io/releases/
+    artifact_fname: "valkey"
+    container_registry:
+        -
+            name: "Docker Hub"
+            link: https://hub.docker.com/r/valkey/valkey/
+            id: "valkey/valkey"
+            tags:
+                - "8.0.4"
+                - "8.0.4-bookworm"
+                - "8.0.4-alpine"
+                - "8.0.4-alpine3.22"
+    packages:
+
+    artifacts:
+        -   distro: jammy
+            arch:
+                -   arm64
+                -   x86_64
+        -   distro: noble
+            arch:
+                -   arm64
+                -   x86_64
+---
+
+Valkey 8.0.4 Release