Add IBRB's mpox clade-I public build

The underlying dataset has been generated by EKL at INRB (DRC) and we've
been given permission to advertise this public build. Adding as the
first tile as this was declared a PHEIC a ~week ago [1]

[1] <https://www.who.int/news/item/14-08-2024-who-director-general-declares-mpox-outbreak-a-public-health-emergency-of-international-concern>

static-site/content/featured-analyses.yaml

@@ -5,6 +5,11 @@
 #   when rendered on the splash page.
 # - Ensure URLs start with `/`.
 
+- name: Mpox clade-I
+  description: INRB (DRC) analysis of ongoing mpox clade-I outbreak (PHEIC)
+  img: mpox_drc.png
+  url: /groups/inrb-mpox/clade-I
+
 - name: SARS-CoV-2
   description: Ongoing evolution and spread of SARS-CoV-2
   img: ncov_freq.png
@@ -21,7 +26,7 @@
   url: /avian-flu/h5n1/ha/2y
 
 - name: Mpox
-  description: Evolution and spread mpox virus
+  description: Evolution and spread of mpox virus (clade-IIb)
   img: mpox_tree.png
   url: /mpox/clade-IIb