Bump ajv from 6.5.4 to 6.12.6 in /sensational-slides-with-mdx-deck#42

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dependabot/npm_and_yarn/sensational-slides-with-mdx-deck/ajv-6.12.6cksachdev/demo:dependabot/npm_and_yarn/sensational-slides-with-mdx-deck/ajv-6.12.6Copy head branch name to clipboard