devtools/curl_worker.sh: POST for issues

Use the POST method for URL paths starting with "issues".

Change-Id: I9abd252b4fadba7d5c75f36907dc47191a8ecc96
Reviewed-on: https://go-review.googlesource.com/c/vuln/+/372181
Trust: Jonathan Amsterdam <jba@google.com>
Run-TryBot: Jonathan Amsterdam <jba@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Julie Qiu <julie@golang.org>
diff --git a/devtools/curl_worker.sh b/devtools/curl_worker.sh
index bece4da..e2eb925 100755
--- a/devtools/curl_worker.sh
+++ b/devtools/curl_worker.sh
@@ -29,7 +29,7 @@
 
 tok=$(gcloud --impersonate-service-account $svc_acct auth print-identity-token --audiences $oauth_client_id  --include-email)
 
-if [[ $path = update* ]]; then
+if [[ $path = update* || $path = issue* ]]; then
   args="-X POST"
 fi