Add yet another prerelease note needle

Seriously starting to think about separating out this ident
stuff into a separate test case :/

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

needles/anaconda/identification/prerelease_note_workstation_blue-20190829.json

@@ -0,0 +1,15 @@
+{
+    "area": [
+        {
+            "height": 26,
+            "type": "match",
+            "width": 159,
+            "xpos": 781,
+            "ypos": 60
+        }
+    ],
+    "properties": [],
+    "tags": [
+        "prerelease_note"
+    ]
+}