Update main.yml

Author: romainguy

.github/workflows/main.yml

@@ -16,7 +16,7 @@ jobs:
       - uses: actions/checkout@v2
       - name: Run a multi-line script
         run: ./gradlew assemble
-      - uses: actions/upload-artifact@v2.0.0
+      - uses: actions/upload-artifact@v2
         with:
           name: kotlin-math
           path: ./build/libs/kotlin-math-*.jar