Normalize changelog for Matrix 1.8

See https://github.com/matrix-org/matrix-spec/issues/1614

changelogs/appendices/newsfragments/1573.clarification

@@ -1 +1 @@
-Clarify spec re canonical JSON to handle negative-zero; also, give an example of negative-zero and a large power of ten
+Clarify spec re canonical JSON to handle negative-zero; also, give an example of negative-zero and a large power of ten.

changelogs/appendices/newsfragments/1583.feature

@@ -1 +1 @@
-Allow `+` in Matrix IDs, per [MSC4009](https://github.com/matrix-org/matrix-spec-proposals/pull/4009).
+Allow `+` in Matrix IDs, as per [MSC4009](https://github.com/matrix-org/matrix-spec-proposals/pull/4009).

changelogs/application_service/newsfragments/1584.clarification

@@ -1 +1 @@
-Fix JSON schema of custom fields in query.
+Fix type of custom `fields` in thirdparty lookup queries.

changelogs/internal/newsfragments/1551.clarification

@@ -1 +1 @@
-Fix the sidebar in recent versions of Hugo
+Fix the sidebar in recent versions of Hugo.

changelogs/internal/newsfragments/1562.clarification

@@ -1 +1 @@
-Make sure version in x-changedInMatrixVersion is a string.
+Make sure version in `x-changedInMatrixVersion` is a string.

changelogs/internal/newsfragments/1620.feature

@@ -1 +1 @@
-Create @matrix-org/spec npm package to ship the SAS Emoji data definitions & translations.
+Create `@matrix-org/spec` npm package to ship the SAS Emoji data definitions & translations.

changelogs/room_versions/newsfragments/1604.feature.2

@@ -0,0 +1 @@
+Move `redacts` from top level to `content` on `m.room.redaction` events in room version 11, as per [MSC2174](https://github.com/matrix-org/matrix-spec-proposals/pull/2174).

changelogs/room_versions/newsfragments/1604.feature.3

@@ -0,0 +1 @@
+Remove `creator` from `m.room.creator` events in room version 11, as per [MSC2175](https://github.com/matrix-org/matrix-spec-proposals/pull/2175).

changelogs/room_versions/newsfragments/1604.feature.4

@@ -0,0 +1 @@
+Remove remaining usage of `origin` from events in room version 11, as per [MSC3989](https://github.com/matrix-org/matrix-spec-proposals/pull/3989).

changelogs/room_versions/newsfragments/1604.feature.5

@@ -0,0 +1 @@
+Update the redaction rules in room version 11, as per [MSC2176](https://github.com/matrix-org/matrix-spec-proposals/pull/2176) and [MSC3821](https://github.com/matrix-org/matrix-spec-proposals/pull/3821).

changelogs/server_server/newsfragments/1559.clarification

@@ -1 +1 @@
-Fix definition of response of `POST /_matrix/federation/v1/user/keys/claim`.
+Fix response definition for `POST /_matrix/federation/v1/user/keys/claim`.

changelogs/server_server/newsfragments/1560.clarification

@@ -1 +1 @@
-Fix level of examples in server keys definition.
+Fix examples in server keys definition.