Update publish.sh

publish.sh

@@ -10,10 +10,11 @@
 set -x -e
 
 # The rust min version we (and cxx) "support" can no longer resolve the crate
-# graph correctly (it picks a once_cell that requires rust 2021), so we publish
-# with the first version of rust that supported 2021.
+# graph correctly (it picks a once_cell that requires rust 2021), and various
+# other crates' latest versions no longer work with 1.48.
+# We publish with the first version of Rust that can publish and verify the crates.
 RUST_MIN_VERSION=1.48.0
-RUST_DEPLOY_VERSION=1.60.0
+RUST_DEPLOY_VERSION=1.61.0
 
 # This is just to make sure we've got the compiler.
 rustc +$RUST_DEPLOY_VERSION --version