tree: Fix bug with loading detached field index (microsoft#22680)

## Description

Fixed a bug in `DetachedFieldIndex.setRevisionsForLoadedData` where the
newly created `DetachedField` entries incorrectly had a field named
`latestRevision` instead of `latestRelevantRevision`.

packages/dds/tree/src/core/tree/detachedFieldIndex.ts

@@ -357,10 +357,13 @@ export class DetachedFieldIndex {
 			0x9bd /* revisions should only be set once using this function after loading data from a summary */,
 		);
 
-		const newDetachedNodeToField = new Map();
+		const newDetachedNodeToField: NestedMap<Major, Minor, DetachedField> = new Map();
 		const rootMap = new Map();
 		forEachInNestedMap(this.detachedNodeToField, ({ root }, major, minor) => {
-			setInNestedMap(newDetachedNodeToField, major, minor, { root, latestRevision });
+			setInNestedMap(newDetachedNodeToField, major, minor, {
+				root,
+				latestRelevantRevision: latestRevision,
+			});
 			rootMap.set(root, { major, minor });
 		});