Format H1 HA Auspice config like Python's JSON module does

Keep the formatting of the Auspice config JSON for H1 HA that Python's
JSON module produces in the `scripts/generate_scale_for_coloring.py`
script.

profiles/nextflu-private/h1n1pdm/ha/auspice_config.json

@@ -1,10 +1,22 @@
 {
   "title": "Real-time tracking of influenza A/H1N1pdm evolution",
   "maintainers": [
-    {"name": "Jover Lee", "url": "https://bedford.io/team/jover-lee/"},
-    {"name": "John Huddleston", "url": "https://bedford.io/team/john-huddleston/"},
-    {"name": "Richard Neher", "url": "https://neherlab.org/richard-neher.html"},
-    {"name": "Trevor Bedford", "url": "https://bedford.io/team/trevor-bedford/"}
+    {
+      "name": "Jover Lee",
+      "url": "https://bedford.io/team/jover-lee/"
+    },
+    {
+      "name": "John Huddleston",
+      "url": "https://bedford.io/team/john-huddleston/"
+    },
+    {
+      "name": "Richard Neher",
+      "url": "https://neherlab.org/richard-neher.html"
+    },
+    {
+      "name": "Trevor Bedford",
+      "url": "https://bedford.io/team/trevor-bedford/"
+    }
   ],
   "data_provenance": [
     {