Update a couple of GNOME needles for appearance changes today

I guess this is related to the cluster of GNOME bits that was
updated recently. Just a slightly different background color for
the control-center sidebar, and slightly different rendering of
the misspelling red dot underline in gte.

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

needles/gnome/apps/apps_settings_menu_background-appearance-20230831.json

@@ -0,0 +1,15 @@
+{
+  "area": [
+    {
+      "width": 84,
+      "height": 23,
+      "ypos": 198,
+      "xpos": 45,
+      "type": "match"
+    }
+  ],
+  "properties": [],
+  "tags": [
+    "apps_settings_menu_background"
+  ]
+}

needles/gnome/apps/gnome-text-editor/gte_text_replaced-20230831.json

@@ -0,0 +1,15 @@
+{
+  "area": [
+    {
+      "xpos": 182,
+      "type": "match",
+      "width": 52,
+      "height": 24,
+      "ypos": 200
+    }
+  ],
+  "properties": [],
+  "tags": [
+    "gte_text_replaced"
+  ]
+}