fixes toml formatting problem (#318)

### Description

On publishing, Zola choked on the date formatting for the Swift blog.
This corrects the date format and allows for publishing.

 
### Issues Resolved

n/a

### Check List
- [x] Commits are signed per the DCO using `--signoff`

By submitting this pull request, I confirm that my contribution is made
under the terms of the BSD-3-Clause License.

Signed-off-by: Kyle J. Davis <kyledvs@amazon.com>

Author: stockholmux

content/blog/2025-08-04-valkey-swift/index.md

@@ -1,7 +1,7 @@
 +++
 title= "Introducing valkey-swift, the Swift client for Valkey"
 description = "The new Swift client for Valkey is now in preview. Learn about its features and how it brings the performance of Valkey to the Swift language."
-date= 2025-08-04 9:00:00
+date= 2025-08-04 00:00:00
 authors= [ "adamfowler"]
 
 [extra]