Shrink match area on install_lang needle a bit for IoT

IoT says "FEDORA-IOT" here, not just "FEDORA", and the greyspace
at the right-hand side was making the match fail. Not sure why
this only just started being a problem, but oh well, let's
make it a bit smaller.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

needles/anaconda/lang_select/install_lang-20200116.json

@@ -1,16 +1,16 @@
-{
-  "area": [
-    {
-      "ypos": 102,
-      "width": 87,
-      "type": "match",
-      "height": 28,
-      "xpos": 357
-    }
-  ],
-  "properties": [],
-  "tags": [
-    "anaconda_select_install_lang",
-    "ENV-DISTRI-fedora"
-  ]
+{
+    "area": [
+        {
+            "height": 28,
+            "type": "match",
+            "width": 83,
+            "xpos": 357,
+            "ypos": 102
+        }
+    ],
+    "properties": [],
+    "tags": [
+        "anaconda_select_install_lang",
+        "ENV-DISTRI-fedora"
+    ]
 }