Correct bloock snippets code

Author: carlosmartgom

examples/key/load_local_certificate/load_local_certificate.ts

@@ -8,4 +8,6 @@ const keyClient = new KeyClient();
 const dirPath = path.join(__dirname, '/certificate.p12');
 const buffer = fs.readFileSync(dirPath);
 
-const _certificate = await keyClient.loadLocalCertificate(buffer, 'password');
+const uint8 = new Uint8Array(buffer);
+
+const _certificate = await keyClient.loadLocalCertificate(uint8, 'password');

examples/record/prepare_record/prepare_record.ts

@@ -14,7 +14,9 @@ try {
 
   // we can read a file as an array of bytes
   const file = fs.readFileSync('sample.pdf');
-  const _record3 = await recordClient.fromFile(file).build();
+  const uint8 = new Uint8Array(file);
+
+  const _record3 = await recordClient.fromFile(uint8).build();
 } catch (e) {
   console.log(e);
 }