docs: add issue number to decryptPdf example

Author: ahochsteger

src/examples/advanced/decryptPdf.ts

@@ -15,6 +15,7 @@ export const info: ExampleInfo = {
   description:
     "The action `custom.decryptAndStorePdf` decrypts and stores a PDF file.",
   category: ExampleCategory.ADVANCED,
+  issues: [355],
   pullRequests: [381],
 }
 

src/gas/examples/advanced/decryptPdf-test.js

@@ -12,6 +12,7 @@ function decryptPdfTestConfig() {
     description:
       "The action `custom.decryptAndStorePdf` decrypts and stores a PDF file.",
     category: "advanced",
+    issues: [355],
     pullRequests: [381],
   }