Fixes build artifacts workflow

Signed-off-by: Darshit Chanpura <[email protected]>

Author: DarshitChanpura

.github/workflows/ci.yml

@@ -337,7 +337,7 @@ jobs:
 
 
           # Build artifacts
-          ./gradlew clean :assemble && \
+          ./gradlew clean assemble && \
           test -s ./build/distributions/opensearch-security-$security_plugin_version.zip && \
           test -s ./spi/build/libs/opensearch-resource-sharing-spi-$security_plugin_version.jar