fix: comment Dockerfile note to prevent syntax error

Author: Shubb07

docker/frontend/Dockerfile

@@ -55,7 +55,7 @@ ENV NODE_ENV=production
 # Fix CVE-2026-23745: Update npm's bundled tar to 7.5.7 in runner stage
 # Fix CVE-2026-25547: Update npm's bundled @isaacs/brace-expansion to 5.0.1
 # Combined into single RUN to reduce layers
-Note: Must download tar with npm pack BEFORE removing the old tar (npm needs it)
+# Note: Must download tar with npm pack BEFORE removing the old tar (npm needs it)
 RUN cd /tmp && \
     npm pack tar@7.5.7 && \
     tar -xzf tar-7.5.7.tgz && \