chore: update themes json list

Author: github-actions[bot]

monkeytype-data/themes.json

@@ -744,6 +744,19 @@
         "colorfulErrorExtraColor": "#9b225c",
         "name": "solarized_light"
     },
+    {
+        "bgColor": "#00141a",
+        "mainColor": "#859900",
+        "caretColor": "#b58900",
+        "subColor": "#2aa198",
+        "subAltColor": "#00222b",
+        "textColor": "#eee8d5",
+        "errorColor": "#dc322f",
+        "errorExtraColor": "#9b225c",
+        "colorfulErrorColor": "#d33682",
+        "colorfulErrorExtraColor": "#9b225c",
+        "name": "solarized_osaka"
+    },
     {
         "bgColor": "#0c100e",
         "mainColor": "#89c559",