Added missing rust toolchain component to GHA workflow (#333)

Signed-off-by: Katherine Hough <kmhough@amazon.com>

Author: katherine-hough

.github/workflows/run_cedar_java_reusable.yml

@@ -40,7 +40,7 @@ jobs:
           ref: ${{ inputs.cedar_policy_ref }}
           path: ./cedar
       - name: Prepare Rust Build
-        run: rustup install stable && rustup default stable 
+        run: rustup install stable && rustup default stable && rustup component add rustfmt
       - name: Configure CedarJavaFFI for CI build
         run: bash configure_ci_build.sh
       - name: Check FFI Formatting