Fix config changes missed during migration

repo-owner should match the new URLs.

Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>
Change-Id: I1852502db62236b521170fa40f1a86e544691a95
diff --git a/mbed-tls-pr-merge.yaml b/mbed-tls-pr-merge.yaml
index 30f9d2c..c031f19 100644
--- a/mbed-tls-pr-merge.yaml
+++ b/mbed-tls-pr-merge.yaml
@@ -31,7 +31,7 @@
     - github:
         api-uri: https://api.github.com
         credentials-id: mbedtls-github-token
-        repo-owner: ARMmbed
+        repo-owner: Mbed-TLS
         repo: mbedtls
         repository-url: https://github.com/Mbed-TLS/mbedtls.git
         branch-discovery: no-pr