Update shinytest2 snapshots for CI viewport width

Update plotly_relayout width from 962 to 947 to match current CI
environment viewport dimensions.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: cpsievert

inst/examples/shiny/event_data/tests/testthat/_snaps/shinytest2/002.json

@@ -18,7 +18,7 @@
     "plotly_afterplot-A": "\"plot\"",
     "plotly_click-A": "[{\"curveNumber\":0,\"pointNumber\":7,\"x\":24.4,\"y\":3.19,\"customdata\":\"Merc 240D\"}]",
     "plotly_hover-A": null,
-    "plotly_relayout-A": "{\"width\":962,\"height\":400}"
+    "plotly_relayout-A": "{\"width\":947,\"height\":400}"
   },
   "output": {
     "brushed": "[1] \"Brush extents appear here (double-click to clear)\"",

inst/examples/shiny/event_data/tests/testthat/_snaps/shinytest2/003.json

@@ -20,7 +20,7 @@
     "plotly_brushing-A": "{\"x\":[23.95978500551268,25.98332414553473],\"y\":[3.0020072289156627,3.5073743975903615]}",
     "plotly_click-A": "[{\"curveNumber\":0,\"pointNumber\":7,\"x\":24.4,\"y\":3.19,\"customdata\":\"Merc 240D\"}]",
     "plotly_hover-A": null,
-    "plotly_relayout-A": "{\"width\":962,\"height\":400}",
+    "plotly_relayout-A": "{\"width\":947,\"height\":400}",
     "plotly_selected-A": "[{\"curveNumber\":0,\"pointNumber\":7,\"x\":24.4,\"y\":3.19,\"customdata\":\"Merc 240D\"}]",
     "plotly_selecting-A": "[{\"curveNumber\":0,\"pointNumber\":7,\"x\":24.4,\"y\":3.19,\"customdata\":\"Merc 240D\"}]"
   },

inst/examples/shiny/event_data/tests/testthat/_snaps/shinytest2/004.json

@@ -21,7 +21,7 @@
     "plotly_click-A": null,
     "plotly_deselect-A": "\"plot\"",
     "plotly_hover-A": null,
-    "plotly_relayout-A": "{\"width\":962,\"height\":400}",
+    "plotly_relayout-A": "{\"width\":947,\"height\":400}",
     "plotly_selected-A": null,
     "plotly_selecting-A": null
   },