Update recommended Terraform provider versions

* Sync Terraform provider plugin versions to those used
internally
* Update mkdocs-material from v5.5.1 to v5.5.6
* Fix minor details in docs

docs/flatcar-linux/aws.md

@@ -55,7 +55,7 @@ terraform {
     }
     aws = {
       source = "hashicorp/aws"
-      version = "3.1.0"
+      version = "3.2.0"
     }
   }
 }

docs/flatcar-linux/azure.md

@@ -52,7 +52,7 @@ terraform {
     }
     azurerm = {
       source = "hashicorp/azurerm"
-      version = "2.22.0"
+      version = "2.23.0"
     }
   }
 }

docs/flatcar-linux/google-cloud.md

@@ -56,7 +56,7 @@ terraform {
     }
     google = {
       source = "hashicorp/google"
-      version = "3.33.0"
+      version = "3.34.0"
     }
   }
 }