[Snyk] Upgrade gatsby-plugin-sharp from 3.6.0 to 3.15.0#374

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

snyk-upgrade-ab9652ab917142775d5a67d3f1ca0437ibm-self-serve-assets/ibm-gsi-cloudnative-journey:snyk-upgrade-ab9652ab917142775d5a67d3f1ca0437Copy head branch name to clipboard