Update the link to rustfmt.toml

Previous link was incorrect.

Test: N/A
Change-Id: I43e394dd6fbdaebb62839f2677fc1159cc1d10c9
diff --git a/rustfmt.toml b/rustfmt.toml
index 475ba8f..ee92d9e 120000
--- a/rustfmt.toml
+++ b/rustfmt.toml
@@ -1 +1 @@
-../../../build/soong/scripts/rustfmt.toml
\ No newline at end of file
+../../build/soong/scripts/rustfmt.toml
\ No newline at end of file