[RFC 136] Fix typo (NixOS#161)

This typo got added at the last minute while other mistakes were being
corrected. See [1] and [2].

[1]: <NixOS#136 (comment)>
[2]: <NixOS@64fe8f3>

rfcs/0136-stabilize-incrementally.md

@@ -379,7 +379,7 @@ None at this time.
 # Future work
 [future]: #future-work
 
-Generalizing features (live pure eval and search) to work without Flakes might be desired by the Flake-skeptic faction, but is purposely left as future work in order to not delay stabilization.
+Generalizing features (like pure eval and search) to work without Flakes might be desired by the Flake-skeptic faction, but is purposely left as future work in order to not delay stabilization.
 
 General feature stability lifecycle: https://discourse.nixos.org/t/potential-rfc-idea-stability/27055