DOC-2582: Update comments in the html sorce examples.

Author: kemister85

modules/ROOT/pages/export-to-pdf-with-jwt-authentication-nodejs.adoc

@@ -117,7 +117,7 @@ Your project should look like this:
       },
       exportpdf_service_url: "<serviceURL>",
 
-      // export_token_provider fetches a token from the `/jwt` endpoint.
+      // exportpdf_token_provider fetches a token from the `/jwt` endpoint.
       exportpdf_token_provider: () => {
         return fetch('http://localhost:3000/jwt', {
           method: 'POST',

modules/ROOT/pages/export-to-word-with-jwt-authentication-nodejs.adoc

@@ -115,7 +115,7 @@ Your project should look like this:
       },
       exportword_service_url: "<serviceURL>",
 
-      // export_token_provider fetches a token from the `/jwt` endpoint.
+      // exportword_token_provider fetches a token from the `/jwt` endpoint.
       exportword_token_provider: () => {
         return fetch('http://localhost:3000/jwt', {
           method: 'POST',

modules/ROOT/pages/importword-with-jwt-authentication-nodejs.adoc

@@ -117,7 +117,7 @@ Your project should look like this:
       },
       importword_service_url: "<serviceURL>",
 
-      // export_token_provider fetches a token from the `/jwt` endpoint.
+      // importword_token_provider fetches a token from the `/jwt` endpoint.
       importword_token_provider: () => {
         return fetch('http://localhost:3000/jwt', {
           method: 'POST',