Fix property names for ossrh username and password

protoc-artifacts/build.gradle

diff --git a/protoc-artifacts/build.gradle b/protoc-artifacts/build.gradle
index ab5edd8..b95d00c 100644
--- a/protoc-artifacts/build.gradle
+++ b/protoc-artifacts/build.gradle
@@ -53,13 +53,13 @@
 
   repository(url: "https://oss.sonatype.org/service/local/staging/deploy/maven2/") {
     if (rootProject.hasProperty("ossrhUsername") && rootProject.hasProperty("ossrhPassword")) {
-      authentication(userName: sonatypeUsername, password: sonatypePassword)
+      authentication(userName: ossrhUsername, password: ossrhPassword)
     }
   }
 
   snapshotRepository(url: "https://oss.sonatype.org/content/repositories/snapshots/") {
     if (rootProject.hasProperty("ossrhUsername") && rootProject.hasProperty("ossrhPassword")) {
-      authentication(userName: sonatypeUsername, password: sonatypePassword)
+      authentication(userName: ossrhUsername, password: ossrhPassword)
     }
   }
 }