SONAR-26973 Fix the Release Action

Author: carminevassallo

.github/actions/helm-index/Dockerfile

@@ -1,14 +1,14 @@
 ARG VERSION=3.6.3
 FROM  alpine/helm:$VERSION
 
-# Create a non-root user
-RUN addgroup -g 1000 helm && \
-    adduser -D -u 1000 -G helm helm
+# Create a non-root user matching GitHub Actions runner UID
+RUN addgroup -g 1001 runner && \
+    adduser -D -u 1001 -G runner runner
 
 COPY entrypoint.sh /entrypoint.sh
 RUN chmod +x /entrypoint.sh
 
 # Switch to non-root user
-USER helm
+USER runner
 
 ENTRYPOINT ["/entrypoint.sh"]