Merge pull request astarte-platform#440 from joshuachp/chore/rust-toolchain

chore(rust-toolchain): update to stable 1.86.0

Author: harlem88

rust-toolchain.toml

@@ -17,6 +17,6 @@
 # SPDX-License-Identifier: Apache-2.0
 
 [toolchain]
-channel = "1.87.0-beta.1"
+channel = "1.86.0"
 components = ["rust-analyzer", "llvm-tools"]
 profile = "default"