Update Rust to 1.90.0 (#8962)

ci/rust-version.sh

@@ -29,7 +29,7 @@ fi
 if [[ -n ${RUST_NIGHTLY_VERSION:-} ]]; then
   nightly_version="$RUST_NIGHTLY_VERSION"
 else
-  nightly_version=2025-06-23
+  nightly_version=2025-08-02
 fi
 
 

rust-toolchain.toml

@@ -1,2 +1,2 @@
 [toolchain]
-channel = "1.89.0"
+channel = "1.90.0"