[Devsetup] Install the latest rust toolchain

scripts/dev_setup.sh

@@ -461,16 +461,17 @@ function install_toolchain {
 }
 
 function install_rustup_components_and_nightly {
+  echo "Updating rustup and installing the latest rustc, rustfmt & clippy"
+  rustup update
+  rustup toolchain install stable # Install the latest toolchain to ensure that dependencies can always be built (even if aptos-core is behind)
+  rustup component add rustfmt
+  rustup component add clippy
+
   echo "Printing the rustup version and toolchain list"
   rustup --version
   rustup show
   rustup toolchain list -v
 
-  echo "Updating rustup and installing rustfmt & clippy"
-  rustup update
-  rustup component add rustfmt
-  rustup component add clippy
-
   # We require nightly for strict rust formatting
   echo "Installing the nightly toolchain and rustfmt nightly"
   if ! rustup toolchain install nightly; then