Add a new F34 background transition needle

We somehow hit a transition point that didn't match any existing
needle. Oh background transitions, how I love you.

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

needles/background/34_background-transition4-20210830.json

@@ -0,0 +1,15 @@
+{
+  "area": [
+    {
+      "xpos": 794,
+      "height": 132,
+      "width": 142,
+      "ypos": 314,
+      "type": "match"
+    }
+  ],
+  "properties": [],
+  "tags": [
+    "34_background"
+  ]
+}