Bug 1917740 - Update PDF-related reference for Snap QA tests r=benchatt

Required after mozilla/pdf.js#18698

Differential Revision: https://phabricator.services.mozilla.com/D223272

taskcluster/docker/snap-coreXX-build/snap-tests/qa_tests/qa_expectations.json

@@ -70,6 +70,65 @@
         "reference": "test_pdf_navigation_hand_tool_esr.png"
       }
     },
+    "nightly": {
+      "base": {
+        "reference": "test_pdf_navigation_base-nightly.png"
+      },
+      "next": {
+        "reference": "test_pdf_navigation_next-nightly.png"
+      },
+      "previous": {
+        "reference": "test_pdf_navigation_previous-nightly.png"
+      },
+      "down": {
+        "reference": "test_pdf_navigation_down-nightly.png"
+      },
+      "up": {
+        "reference": "test_pdf_navigation_up-nightly.png"
+      },
+      "right": {
+        "reference": "test_pdf_navigation_right-nightly.png"
+      },
+      "left": {
+        "reference": "test_pdf_navigation_left-nightly.png"
+      },
+      "pagedown": {
+        "reference": "test_pdf_navigation_pagedown-nightly.png"
+      },
+      "pageup": {
+        "reference": "test_pdf_navigation_pageup-nightly.png"
+      },
+      "end": {
+        "reference": "test_pdf_navigation_end-nightly.png"
+      },
+      "home": {
+        "reference": "test_pdf_navigation_home-nightly.png"
+      },
+      "firstPage": {
+        "reference": "test_pdf_navigation_firstPage-nightly.png"
+      },
+      "lastPage": {
+        "reference": "test_pdf_navigation_lastPage-nightly.png"
+      },
+      "pageRotateCw": {
+        "reference": "test_pdf_navigation_pageRotateCw-nightly.png"
+      },
+      "pageRotateCcw": {
+        "reference": "test_pdf_navigation_pageRotateCcw-nightly.png"
+      },
+      "documentProperties": {
+        "reference": "test_pdf_navigation_documentProperties-nightly.png"
+      },
+      "select_text_with_highlight": {
+        "reference": "test_pdf_navigation_select_text_with_highlight-nightly.png"
+      },
+      "select_text_without_highlight": {
+        "reference": "test_pdf_navigation_select_text_without_highlight-nightly.png"
+      },
+      "hand_tool": {
+        "reference": "test_pdf_navigation_hand_tool-nightly.png"
+      }
+    },
     "base": {
       "reference": "test_pdf_navigation_base.png"
     },
@@ -155,6 +214,32 @@
         "reference": "test_pdf_zoom_p1_width_esr.png"
       }
     },
+    "nightly": {
+      "p1_50p": {
+        "reference": "test_pdf_zoom_p1_50p-nightly.png"
+      },
+      "p1_75p": {
+        "reference": "test_pdf_zoom_p1_75p-nightly.png"
+      },
+      "p1_100p": {
+        "reference": "test_pdf_zoom_p1_100p-nightly.png"
+      },
+      "p1_150p": {
+        "reference": "test_pdf_zoom_p1_150p-nightly.png"
+      },
+      "p1_400p": {
+        "reference": "test_pdf_zoom_p1_400p-nightly.png"
+      },
+      "p1_actual": {
+        "reference": "test_pdf_zoom_p1_actual-nightly.png"
+      },
+      "p1_fit": {
+        "reference": "test_pdf_zoom_p1_fit-nightly.png"
+      },
+      "p1_width": {
+        "reference": "test_pdf_zoom_p1_width-nightly.png"
+      }
+    },
     "p1_50p": {
       "reference": "test_pdf_zoom_p1_50p.png"
     },
@@ -184,6 +269,9 @@
     "esr-115": {
       "reference": "test_pdf_download_base_esr.png"
     },
+    "nightly": {
+      "reference": "test_pdf_download_base-nightly.png"
+    },
     "reference": "test_pdf_download_base.png"
   },
   "test_copy_paste_image_text": {},