Update issuetracking.adoc

Remove gendered "she" from description.
diff --git a/src/main/asciidoc/issuetracking.adoc b/src/main/asciidoc/issuetracking.adoc
index 9e356bc..9a22735 100644
--- a/src/main/asciidoc/issuetracking.adoc
+++ b/src/main/asciidoc/issuetracking.adoc
@@ -19,7 +19,7 @@
 ____
 
 ____
-When the engineer has fixed an issue, she sets the issue to resolved.
+When the engineer has fixed an issue, they set the issue to resolved.
 The submitter can reopen it if there is some problem with it. When the
 release in which the issue is fixed ships, the issue is set to closed.
 ____