Update Avro spec link to canonical URL (currently 301 redirect)

[yada]

Redirecting link (301)

• URL: http://avro.apache.org/docs/current/spec.html
• HTTP status: 301
• Found on:
  • https://microcks.io/blog/apache-kafka-mocking-testing/
  • https://microcks.io/blog/microcks-1.1.0-release/
  • https://microcks.io/blog/apache-kafka-mocking-testing

What to do

• Follow the redirect and replace with the final canonical URL (prefer HTTPS).
• Update all occurrences in the site content.

Help needed

If you’re unsure what the final canonical URL should be, comment here and we’ll confirm.

[Mamdouhreda]

So can You tell me what url do you want these to be redirect to ?
https://microcks.io/blog/apache-kafka-mocking-testing/
https://microcks.io/blog/microcks-1.1.0-release/
https://microcks.io/blog/apache-kafka-mocking-testing

[yada]

The wrong URL and to change is https://avro.apache.org/docs/current/spec.html as current does not exist anymore, so let's point to https://avro.apache.org/docs/ instead to make it simple.