fix: Clarify statements

Co-authored-by: Kevin Reid <kpreid@switchb.org>

Author: epage

text/3692-feature-unification.md

@@ -109,8 +109,8 @@ This is done in the config instead of the manifest:
 - As this can change from run to run, this covers more use cases.
 - As this fits easily into the `resolver` table, there is less design work.
 
-We could extend this with configuration for to exclude packages for the various use cases mentioned.
-Supporting excludes as environemnt/project configuration complexity as well as implementation complexity.
+We could extend this with configuration to exclude packages for the various use cases mentioned.
+Supporting excludes adds environment/project configuration complexity as well as implementation complexity.
 
 # Prior art
 [prior-art]: #prior-art