(maint) Fix to fixtures.yml

The `git` prefix no longer works correctly with our setup and so has been swapped to `https`

Author: david22swan

.fixtures.yml

@@ -5,9 +5,9 @@ fixtures:
     powershell: 'puppetlabs-powershell'
     reboot: 'puppetlabs-reboot'
   repositories:
-    facts: 'git://github.com/puppetlabs/puppetlabs-facts.git'
-    puppet_agent: 'git://github.com/puppetlabs/puppetlabs-puppet_agent.git'
-    provision: 'git://github.com/puppetlabs/provision.git'
+    facts: 'https://github.com/puppetlabs/puppetlabs-facts.git'
+    puppet_agent: 'https://github.com/puppetlabs/puppetlabs-puppet_agent.git'
+    provision: 'https://github.com/puppetlabs/provision.git'
     yumrepo_core: 
       repo: https://github.com/puppetlabs/puppetlabs-yumrepo_core.git
       puppet_version: ">= 6.0.0"