fix: add source map of css file to swagger-ui-react (#7601)

Fixes source map of css file missing in swagger-ui-react.
The source map is referenced in ./dist/swagger-ui.css,
but as it does not exist in the final package creates errors in our tooling.

flavors/swagger-ui-react/release/run.sh

@@ -12,6 +12,7 @@ mkdir -p ../dist
 cp ../../../dist/swagger-ui.js ../dist
 cp ../../../dist/swagger-ui-es-bundle.js ../dist
 cp ../../../dist/swagger-ui.css ../dist
+cp ../../../dist/swagger-ui.css.map ../dist
 
 # Create a releasable package manifest
 node create-manifest.js > ../dist/package.json