Pin dependencies

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
gatsby (changelog)	dependencies	pin	^4.14.0 -> 4.14.0
gatsby-cli	devDependencies	pin	^4.14.0 -> 4.14.0
gatsby-plugin-gatsby-cloud	dependencies	pin	^4.8.0 -> 4.8.0
gatsby-plugin-gdpr-cookies	dependencies	pin	^2.0.8 -> 2.0.8
gatsby-plugin-image	dependencies	pin	^2.8.0 -> 2.8.0
gatsby-plugin-manifest	dependencies	pin	^4.8.0 -> 4.8.0
gatsby-plugin-offline	dependencies	pin	^5.8.0 -> 5.8.0
gatsby-plugin-react-helmet	dependencies	pin	^5.8.0 -> 5.8.0
gatsby-plugin-robots-txt	dependencies	pin	^1.7.0 -> 1.7.0
gatsby-plugin-sass	dependencies	pin	^5.8.0 -> 5.8.0
gatsby-plugin-sharp	dependencies	pin	^4.8.0 -> 4.8.0
gatsby-plugin-sitemap	dependencies	pin	^5.8.0 -> 5.8.0
gatsby-remark-autolink-headers	dependencies	pin	^5.8.0 -> 5.8.0
gatsby-remark-copy-linked-files	dependencies	pin	^5.8.0 -> 5.8.0
gatsby-remark-embed-gist	dependencies	pin	^1.2.1 -> 1.2.1
gatsby-remark-images	dependencies	pin	^6.8.0 -> 6.8.0
gatsby-remark-prismjs	dependencies	pin	^6.8.0 -> 6.8.0
gatsby-remark-responsive-iframe	dependencies	pin	^5.8.0 -> 5.8.0
gatsby-remark-smartypants	dependencies	pin	^5.8.0 -> 5.8.0
gatsby-source-filesystem	dependencies	pin	^4.8.0 -> 4.8.0
gatsby-transformer-remark	dependencies	pin	^5.8.0 -> 5.8.0
gatsby-transformer-sharp	dependencies	pin	^4.8.0 -> 4.8.0

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