Update Node.js to v20.19.6 (#370)

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

ops/.gitlab-ci.yml

@@ -60,7 +60,7 @@ before_script:
 
 postman:
   type: best_practices
-  image: node:20.19.5-alpine
+  image: node:20.19.6-alpine
   before_script:
   - npm install -g newman
   script: