Update CHANGELOG.md

CHANGELOG.md

@@ -25,10 +25,13 @@ Changes to `main` that are *not* in the latest pre-release:
 - Fixed: incorrect `padding` property value pair in `search.scss` by [@kevinlin1] in [#1123]
 - Fixed: minor spacing and comment nits by [@EricFromCanada] in [#1128]
 - Fixed: exclude images from being bundled with gem by [@m-r-mccormick] in [#1142]
+- Docs: add a migration guide by [@pdmosses] in [#1059]
 - Docs: update `README` demo video by [@codewithfan] in [#1097]
 - Docs: update "View Typography Utilities" link by [@agabrys] in [#1130]
 - Docs: fix broken relative page links by [@mattxwang] in [#1106]
+- Docs: clarify steps to add custom `lunr` index code by [@diablodale] in [#1139]
 
+[#1059]: https://github.com/just-the-docs/just-the-docs/pull/1059
 [#1068]: https://github.com/just-the-docs/just-the-docs/pull/1068
 [#1097]: https://github.com/just-the-docs/just-the-docs/pull/1097
 [#1106]: https://github.com/just-the-docs/just-the-docs/pull/1106
@@ -36,6 +39,7 @@ Changes to `main` that are *not* in the latest pre-release:
 [#1128]: https://github.com/just-the-docs/just-the-docs/pull/1128
 [#1130]: https://github.com/just-the-docs/just-the-docs/pull/1130
 [#1135]: https://github.com/just-the-docs/just-the-docs/pull/1135
+[#1139]: https://github.com/just-the-docs/just-the-docs/pull/1139
 [#1142]: https://github.com/just-the-docs/just-the-docs/pull/1142
 
 [@agabrys]: https://github.com/agabrys