Update index.qmd

Co-authored-by: Markus Hauru <mhauru@turing.ac.uk>

Author: penelopeysm

usage/threadsafe-evaluation/index.qmd

@@ -258,7 +258,7 @@ As it happens, much of what is needed in DynamicPPL can be constructed such that
 For example, as long as there is no need to *sample* new values of random variables, it is actually fine to completely omit the metadata object.
 This is the case for `LogDensityFunction`: since values are provided as the input vector, there is no need to store it in metadata.
 We need only calculate the associated log-prior probability, which is stored in an accumulator.
-Thus, starting from DynamicPPL v0.39, `LogDensityFunction` itself is in fact completely threadsafe.
+Thus, starting from DynamicPPL v0.39, `LogDensityFunction` itself will in fact be completely threadsafe.
 
 Technically speaking, this is achieved using `OnlyAccsVarInfo`, which is a subtype of `VarInfo` that only contains accumulators, and no metadata at all.
 It implements enough of the `VarInfo` interface to be used in model evaluation, but will error if any functions attempt to modify or read its metadata.