chore(website): Using the existing ECL_VERSION to dynamically refer t…

…o the proper url of the CDN

src/website/src/pages/ec/getting-started/index.mdx

@@ -92,7 +92,7 @@ There are also other optional css files distributed that can be used, pikaday is
 ECL is also distributing its presets on a CDN, all the files distributed in the package mentioned before are also available there, this is the pattern to reach them:
 `https://cdn{1,2,3 or 4}.fpfis.tech.ec.europa.eu/ecl/{tag}/{system}/{path/to/the/asset}`
 
-Ex: https://cdn1.fpfis.tech.ec.europa.eu/ecl/v3.9.1/ec/styles/optional/ecl-ec-default.css
+Ex: https://cdn1.fpfis.tech.ec.europa.eu/ecl/{process.env.ECL_VERSION}/ec/styles/optional/ecl-ec-default.css
 
 Download a `preset-ec` package from the release page to see all the files available so to know how to reach them in the CDN, the file system is the same.
 

src/website/src/pages/eu/getting-started/index.mdx

@@ -91,7 +91,7 @@ There are also other optional css files distributed that can be used, moment.js
 ECL is also distributing its presets on a CDN, all the files distributed in the package mentioned before are also available in the CDN, this is the pattern to reach them:
 `https://cdn{1,2,3 or 4}.fpfis.tech.ec.europa.eu/ecl/{tag}/{system}/{path/to/the/asset}`
 
-Ex: https://cdn1.fpfis.tech.ec.europa.eu/ecl/v3.9.1/eu/styles/optional/ecl-eu-default.css
+Ex: https://cdn1.fpfis.tech.ec.europa.eu/ecl/{process.env.ECL_VERSION}/eu/styles/optional/ecl-eu-default.css
 
 Download a `preset-eu` package to see all the files available to know how to reach them in the CDN, the file system is the same.