Update semantic-conventions/syntax.md

Co-authored-by: Trask Stalnaker <[email protected]>

semantic-conventions/syntax.md

@@ -377,7 +377,7 @@ An enum entry has the following fields:
 - `value`, string, int, or boolean; value of the enum entry.
 - `brief`, optional string, brief description of the enum entry value. It defaults to the value of `id`.
 - `note`, optional string, longer description. It defaults to an empty string.
-- `stability`, optional stability level, default to `experimental`. Attributes marked as experimental cannot have stable memvers.
+- `stability`, optional stability level, default to `experimental`. Attributes marked as experimental cannot have stable members.
 
 ### Constraints