docs(release): add vote thread to result template

[villebro]

SUMMARY

Add placeholder for email vote thread to to result email template.

ADDITIONAL INFORMATION

• Has associated issue:
• Changes UI
• Requires DB Migration.
• Confirm DB Migration upgrade and downgrade tested.
• Introduces new feature or API
• Removes existing feature or API

[codecov-io]

Codecov Report

Merging #12591 (cc03cdc) into master (e7a5d0d) will decrease coverage by 2.79%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #12591      +/-   ##
==========================================
- Coverage   66.75%   63.96%   -2.80%     
==========================================
  Files        1015      486     -529     
  Lines       49638    29970   -19668     
  Branches     4839        0    -4839     
==========================================
- Hits        33137    19171   -13966     
+ Misses      16378    10799    -5579     
+ Partials      123        0     -123     

Flag	Coverage Δ
cypress	?
javascript	?
python	63.96% <ø> (ø)

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Impacted Files	Coverage Δ
...essageToasts/utils/getToastsFromPyFlashMessages.js
...rc/views/CRUD/alert/components/AlertStatusIcon.tsx
...ontend/src/dashboard/util/serializeFilterScopes.js
...tend/src/explore/components/DisplayQueryButton.jsx
...ws/CRUD/data/savedquery/SavedQueryPreviewModal.tsx
...erset-frontend/src/datasource/DatasourceEditor.jsx
...frontend/src/explore/components/DataTablesPane.tsx
...shboard/util/charts/getFormDataWithExtraFilters.ts
superset-frontend/src/components/IconTooltip.tsx
...uperset-frontend/src/components/ExpandableList.tsx
... and 519 more

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