fix(markdown): linter was not being used as formatter

Author: 99linesofcode

devcontainer/php/.devcontainer.json

@@ -14,6 +14,9 @@
         "[php]": {
           "editor.defaultFormatter": "open-southeners.laravel-pint"
         },
+        "[markdown]": {
+          "editor.defaultFormatter": "davidanson.vscode-markdownlint"
+        },
         "bladeFormatter.format.noMultipleEmptyLines": true,
         "bladeFormatter.format.sortHtmlAttributes": "idiomatic",
         "bladeFormatter.format.sortTailwindcssClasses": true,

devcontainer/ruby/.devcontainer.json

@@ -14,6 +14,9 @@
         "[ruby]": {
           "editor.defaultFormatter": "castwide.solargraph"
         },
+        "[markdown]": {
+          "editor.defaultFormatter": "davidanson.vscode-markdownlint"
+        },
         "dotfiles.repository": "99linesofcode/dotfiles",
         "dotfiles.targetPath": "/config/dotfiles",
         "dotfiles.installCommand": "/config/dotfiles/install.sh",