ci(MegaLinter): Reuse config from .github repo

MegaLinter recently fixed a number of bugs in the EXTENDS property in
v6.14.0, v6.16.0, v6.18.0, v6.19.0, and v6.20.0. Leverage this improved
support for config inheritance by extending a central MegaLinter
configuration.

.mega-linter.yaml

@@ -1,15 +1 @@
-APPLY_FIXES: all
-CLEAR_REPORT_FOLDER: true
-DEFAULT_BRANCH: main
-DISABLE_LINTERS:
-  - MARKDOWN_MARKDOWN_LINK_CHECK # Superseded by Lychee
-FAIL_IF_MISSING_LINTER_IN_FLAVOR: true
-FORMATTERS_DISABLE_ERRORS: false
-PRINT_ALPACA: false
-SHOW_ELAPSED_TIME: true
-JSON_PRETTIER_FILE_EXTENSIONS:
-  - .json
-  - .md
-MARKDOWN_MARKDOWNLINT_CONFIG_FILE: LINTER_DEFAULT
-REPOSITORY_SECRETLINT_ARGUMENTS: --secretlintignore .gitignore
-SPELL_CSPELL_CONFIG_FILE: LINTER_DEFAULT
+EXTENDS: https://raw.githubusercontent.com/ScribeMD/.github/0.11.3/.github/base.mega-linter.yaml