Replace color template literal with string (tailwindlabs#9367)

Author: teddybradford

stubs/defaultConfig.stub.js

@@ -721,7 +721,7 @@ module.exports = {
       8: '8px',
     },
     ringColor: ({ theme }) => ({
-      DEFAULT: theme(`colors.blue.500`, '#3b82f6'),
+      DEFAULT: theme('colors.blue.500', '#3b82f6'),
       ...theme('colors'),
     }),
     ringOffsetColor: ({ theme }) => theme('colors'),