[Snyk] Upgrade gatsby-plugin-sharp from 3.6.0 to 3.15.0#383

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

snyk-upgrade-a69a0bb431aa13341f90ec207a5b59c4ibm-self-serve-assets/ibm-gsi-cloudnative-journey:snyk-upgrade-a69a0bb431aa13341f90ec207a5b59c4Copy head branch name to clipboard