fix: one more documentation typo

Author: oneirocosm

docs/docs/connections.mdx

@@ -117,7 +117,7 @@ Suppose you have a connection named `myhost` that shows up as `myusername@myhost
     <... other connections go here ...>,
     "myusername@myhost" : {
         "term:theme": "warmyellow",
-        "term:fontsize": "16",
+        "term:fontsize": 16,
         "term:fontfamily": "menlo"
     },
     <... other connections go here ...>