Update blog post date

The date in the file name and front matter was last updated on
2024-01-07, however it is now 2024-01-09 and the post hasn't been
published to nextstrain.org yet. Updated the date to today, and will
promote to nextstrain.org after merge.

static-site/content/blog/2025-01-07-human-metapneumovirus-analysis-and-resources.md → static-site/content/blog/2025-01-09-human-metapneumovirus-analysis-and-resources.md

@@ -1,6 +1,6 @@
 ---
 author: "Isabel Joia, Richard Neher"
-date: "2025-01-07"
+date: "2025-01-09"
 title: "Phylogenetic analysis of Human Metapneumovirus"
 sidebarTitle: "HMPV Phylogenetic Analysis and Resources"
 ---