ci: fix super-linter configuration settings (#7708)

- Revert the version pin from #7706.
- Override the YAML linter config to be more forgiving.
- Update YAML lint warnings in a number of files.

The choice of which lints to fix and which to override was ad hoc: I fixed the ones that were mainly whitespace oriented, and suppressed the ones that were document-structure related.

Fixes #7707.

.github/linters/markdownlint.yml

@@ -0,0 +1,8 @@
+default: true,
+MD007: {"indent": 4}
+MD013: false
+MD024: {siblings_only: true}
+MD025: false
+MD033: {no-inline-html: false}
+no-hard-tabs: false
+whitespace: false

.github/linters/yaml-lint.yml

@@ -0,0 +1,9 @@
+---
+# Default rules for YAML linting from super-linter.
+# See: See https://yamllint.readthedocs.io/en/stable/rules.html
+extends: default
+rules:
+  document-end: disable
+  document-start: disable
+  line-length: disable
+  truthy: disable