Add missing _defaults to examples Services.yaml in docs

In order to provide fully consistent and working examples.

Documentation/PageviewWidgets/NewestPageviews.rst

@@ -20,6 +20,11 @@ Default widget configuration.
 :file:`Configuration/Services.yaml`::
 
    services:
+     _defaults:
+       autowire: true
+       autoconfigure: true
+       public: false
+
      DanielSiepmann\Tracking\Dashboard\Provider\NewestPageviews:
        arguments:
          $queryBuilder: '@querybuilder.tx_tracking_pageview'

Documentation/PageviewWidgets/PageviewsPerDay.rst

@@ -21,6 +21,11 @@ Default widget configuration.
 :file:`Configuration/Services.yaml`::
 
    services:
+     _defaults:
+       autowire: true
+       autoconfigure: true
+       public: false
+
      DanielSiepmann\Tracking\Dashboard\Provider\PageviewsPerDay:
        arguments:
          $queryBuilder: '@querybuilder.tx_tracking_pageview'

Documentation/PageviewWidgets/PageviewsPerOperatingSystem.rst

@@ -21,6 +21,11 @@ Default widget configuration.
 :file:`Configuration/Services.yaml`::
 
    services:
+     _defaults:
+       autowire: true
+       autoconfigure: true
+       public: false
+
      DanielSiepmann\Tracking\Dashboard\Provider\PageviewsPerOperatingSystem:
        arguments:
          $queryBuilder: '@querybuilder.tx_tracking_pageview'

Documentation/PageviewWidgets/PageviewsPerPage.rst

@@ -21,6 +21,11 @@ Default widget configuration.
 :file:`Configuration/Services.yaml`::
 
    services:
+     _defaults:
+       autowire: true
+       autoconfigure: true
+       public: false
+
      DanielSiepmann\Tracking\Dashboard\Provider\PageviewsPerPage:
        arguments:
          $queryBuilder: '@querybuilder.tx_tracking_pageview'

Documentation/RecordviewWidgets/Recordviews.rst

@@ -28,6 +28,11 @@ Example widget configuration.
 :file:`Configuration/Services.yaml`::
 
    services:
+     _defaults:
+       autowire: true
+       autoconfigure: true
+       public: false
+
      dashboard.provider.danielsiepmann.tracking.records.news:
        class: 'DanielSiepmann\Tracking\Dashboard\Provider\Recordviews'
        arguments: