more conservative caching

Author: josh-heyer

.github/workflows/build-pages.yml

@@ -82,7 +82,6 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-gatsby-build-${{ hashFiles('package.json', 'gatsby-config.js', 'gatsby-node.js', 'src/**/*.js') }}-${{ inputs.ref }}
             ${{ runner.os }}-gatsby-build-${{ hashFiles('package.json', 'gatsby-config.js', 'gatsby-node.js', 'src/**/*.js') }}
-            ${{ runner.os }}-gatsby-build
 
       - name: Fix mtimes
         run: npm run fix-mtimes