build: use rust 1.72.0 instead of nightly

tjdevries · tjdevries · commit 36f03452ac78 · 2023-09-15T09:06:01.000-04:00
diff --git a/.rust-toolchain b/.rust-toolchain
@@ -1,2 +1,2 @@
 [toolchain]
-channel = "nightly"
+channel = "1.72.0"
