github ci: rust version 1.64.0

Author: vladimirovmm

.github/actions/preinstall/action.yml

@@ -22,7 +22,7 @@ runs:
     - name: Install Rust toolchain
       uses: actions-rs/toolchain@v1
       with:
-        toolchain: stable
+        toolchain: 1.64.0
         override: true
         components: rustfmt, clippy