fedora: Add Fedora 43 to the distribution list (microsoft#13643)

Six months have gone by, so it's time for another Fedora release. In
addition to the general Fedora updates this release, the WSL image is
now properly suffixed.

Author: jeremycline

distributions/DistributionInfo.json

@@ -172,10 +172,23 @@
             }
         ],
         "Fedora": [
+            {
+                "Name": "FedoraLinux-43",
+                "FriendlyName": "Fedora Linux 43",
+                "Default": true,
+                "Amd64Url": {
+                    "Url": "https://download.fedoraproject.org/pub/fedora/linux/releases/43/Container/x86_64/images/Fedora-WSL-Base-43-1.6.x86_64.wsl",
+                    "Sha256": "220780af9cf225e9645313b4c7b0457a26a38a53285eb203b2ab6188d54d5b82"
+                },
+                "Arm64Url": {
+                    "Url": "https://download.fedoraproject.org/pub/fedora/linux/releases/43/Container/aarch64/images/Fedora-WSL-Base-43-1.6.aarch64.wsl",
+                    "Sha256": "7eef7a83260218d8c878b3c7bbdaf11772103145184d0c65df27557f4cd49548"
+                }
+            },
             {
                 "Name": "FedoraLinux-42",
                 "FriendlyName": "Fedora Linux 42",
-                "Default": true,
+                "Default": false,
                 "Amd64Url": {
                     "Url": "https://download.fedoraproject.org/pub/fedora/linux/releases/42/Container/x86_64/images/Fedora-WSL-Base-42-1.1.x86_64.tar.xz",
                     "Sha256": "99fb3d05d78ca17c6815bb03cf528da8ef82ebc6260407f2b09461e0da8a1b8d"