Update wording in README efficiency section

Author: robertpiosik

README.md

@@ -30,7 +30,7 @@
 
 #### Efficiency and speed
 
-- With the [Agentic Search](#-agentic-search) prompt, SOTA models offer diminishing returns over mid-tiers.
+- For the [Agentic Search](#-agentic-search) prompt, SOTA models offer diminishing returns over mid-tiers.
 - Thanks to precompiled, zero-overhead nature of [EDIT](#-edit)/[ASK](#-edit) prompts:
   - there are no ever-growing sessions prolonging 'thinking',
   - iteration on instructions doesn't bloat context window.