Fix Vale linting errors

[jdbaldry]

Signed-off-by: Jack Baldry jack.baldry@grafana.com

[github-actions[bot]]

Readability report

File	AutomatedReadability	ColemanLiau	FleschKincaid	FleschReadingEase	GunningFog	LIX	SMOG
docs/sources/contribute/release-notes/index.md	$${8.30\space\color{black}(Δ+0.00)}$$	$${9.37\space\color{black}(Δ+0.00)}$$	$${8.78\space\color{black}(Δ+0.00)}$$	$${60.98\space\color{black}(Δ+0.00)}$$	$${10.60\space\color{black}(Δ+0.00)}$$	$${37.78\space\color{black}(Δ+0.00)}$$	$${11.34\space\color{black}(Δ+0.00)}$$
docs/sources/review/backport-changes/index.md	$${11.86\space\color{black}(Δ+0.00)}$$	$${10.90\space\color{black}(Δ+0.00)}$$	$${11.66\space\color{black}(Δ+0.00)}$$	$${49.98\space\color{black}(Δ+0.00)}$$	$${13.23\space\color{black}(Δ+0.00)}$$	$${51.35\space\color{black}(Δ+0.00)}$$	$${13.26\space\color{black}(Δ+0.00)}$$
docs/sources/review/cla-assistant/index.md	$${8.16\space\color{black}(Δ+0.00)}$$	$${10.72\space\color{black}(Δ+0.00)}$$	$${8.85\space\color{black}(Δ+0.00)}$$	$${54.87\space\color{black}(Δ+0.00)}$$	$${10.99\space\color{black}(Δ+0.00)}$$	$${41.44\space\color{black}(Δ+0.00)}$$	$${11.67\space\color{black}(Δ+0.00)}$$
docs/sources/write/markdown-guide/index.md	$${6.78\space\color{black}(Δ+0.00)}$$	$${10.37\space\color{black}(Δ+0.00)}$$	$${7.28\space\color{black}(Δ+0.00)}$$	$${59.89\space\color{black}(Δ+0.00)}$$	$${8.69\space\color{black}(Δ+0.00)}$$	$${35.85\space\color{black}(Δ+0.00)}$$	$${10.13\space\color{black}(Δ+0.00)}$$
docs/sources/write/shortcodes/index.md	$${7.30\space\color{black}(Δ+0.00)}$$	$${10.36\space\color{black}(Δ+0.00)}$$	$${8.15\space\color{black}(Δ+0.00)}$$	$${56.90\space\color{black}(Δ+0.00)}$$	$${9.67\space\color{black}(Δ+0.00)}$$	$${39.34\space\color{black}(Δ+0.00)}$$	$${10.96\space\color{black}(Δ+0.00)}$$
docs/sources/write/style-guide/inclusive-writing/index.md	$${6.28\space\color{black}(Δ+0.00)}$$	$${9.57\space\color{black}(Δ+0.00)}$$	$${7.67\space\color{black}(Δ+0.00)}$$	$${58.02\space\color{black}(Δ+0.00)}$$	$${9.98\space\color{black}(Δ+0.00)}$$	$${37.36\space\color{black}(Δ+0.00)}$$	$${10.76\space\color{black}(Δ+0.00)}$$
docs/sources/write/style-guide/ux-writing/index.md	$${5.76\space\color{black}(Δ+0.00)}$$	$${9.25\space\color{black}(Δ+0.00)}$$	$${6.65\space\color{black}(Δ+0.00)}$$	$${63.38\space\color{black}(Δ+0.00)}$$	$${8.37\space\color{black}(Δ+0.00)}$$	$${33.65\space\color{black}(Δ+0.00)}$$	$${9.58\space\color{black}(Δ+0.00)}$$
docs/sources/write/style-guide/voice-tone-guidelines/index.md	$${8.27\space\color{black}(Δ+0.00)}$$	$${10.89\space\color{black}(Δ+0.00)}$$	$${8.63\space\color{black}(Δ+0.00)}$$	$${56.36\space\color{black}(Δ+0.00)}$$	$${10.77\space\color{black}(Δ+0.00)}$$	$${39.01\space\color{black}(Δ+0.00)}$$	$${11.86\space\color{black}(Δ+0.00)}$$

View metric targets

| Metric | Range | Ideal score | | --- | --- | --- | | [AutomatedReadability](https://en.wikipedia.org/wiki/Automated_readability_index) | 6 (very easy read) to 14 (extremely difficult read) | 8 or less | | [ColemanLiau](https://en.wikipedia.org/wiki/Coleman%E2%80%93Liau_index) | 6 (very easy read) to 17 (extremely difficult read) | 9 or less | | [FleschKincaid](https://en.wikipedia.org/wiki/Flesch%E2%80%93Kincaid_readability_tests) | 6 (very easy read) to 17 (extremely difficult read) | 8 or less | | [FleschReadingEase](https://en.wikipedia.org/wiki/Flesch%E2%80%93Kincaid_readability_tests) | 100 (very easy read) to 0 (extremely difficult read) | 70 or more | | [GunningFog](https://en.wikipedia.org/wiki/Gunning_fog_index) | 6 (very easy read) to 17 (extremely difficult read) | 10 or less | | [LIX](https://en.wikipedia.org/wiki/Lix_(readability_test)) | 20 (very easy read) to 60+ (extremely difficult read) | 35 or less | | [SMOG](https://en.wikipedia.org/wiki/SMOG) | 6 (very easy read) to 17 (extremely difficult read) | 10 or less |