Explicitly set rust version and print path to android-ndk

Author: alexanderwiederin

.github/workflows/kotlin.yml

@@ -20,6 +20,12 @@ jobs:
           distribution: temurin
           java-version: 11
 
+      - name: Set default Rust version to 1.73.0
+        run: rustup default 1.73.0
+
+      - name: Show default version of NDK
+        run: echo $ANDROID_NDK_ROOT
+
       - name: Run ktlintCheck on ldk-node-jvm
         run: |
           cd $LDK_NODE_JVM_DIR