[Snyk] Upgrade gatsby-plugin-sharp from 3.6.0 to 3.15.0#392

mjperrins wants to merge 1 commit intodev-advancedibm-self-serve-assets/ibm-gsi-cloudnative-journey:dev-advancedfrom

snyk-upgrade-7cf5894d467278bb535e816230e00372ibm-self-serve-assets/ibm-gsi-cloudnative-journey:snyk-upgrade-7cf5894d467278bb535e816230e00372Copy head branch name to clipboard