Address recurrent DNS queries

What's Changed

• CI and documentation generation adjustment by @TwistedTwigleg in #425
• Fix typo in fleet provisioning sample readme by @TwistedTwigleg in #427
• Mqtt5 shared subscription sample by @TwistedTwigleg in #428
• Shared subscription sample readme adjustment by @TwistedTwigleg in #433
• Adjust MQTT5 samples to output JSON by @TwistedTwigleg in #434
• Update CRT dependency to pull in DNS behavior improvements by @bretambrose in #437
• AutoTag PR for v1.13.0 by @TwistedTwigleg in #439

Full Changelog: v1.12.6...v1.13.0