chore: update version in README

sno2 · web-flow · commit 731b3a0e10d1 · 2022-12-29T22:08:53.000-06:00
diff --git a/README.md b/README.md
@@ -85,7 +85,7 @@ Add this to your `Cargo.toml`:
 
 ```toml
 [dependencies]
-hashbrown = "0.12"
+hashbrown = "0.13"
 ```
 
 Then:
