Minor typo correction

Author: Loris-intergalactique

src/query.md

@@ -1,7 +1,7 @@
 # Queries: demand-driven compilation
 
 As described in [the high-level overview of the compiler][hl], the
-Rust compiler is current transitioning from a traditional "pass-based"
+Rust compiler is currently transitioning from a traditional "pass-based"
 setup to a "demand-driven" system. **The Compiler Query System is the
 key to our new demand-driven organization.** The idea is pretty
 simple. You have various queries that compute things about the input