Fixing link example "User-Agent" (#3400)

Added missing >
diff --git a/doc/repository-spec-v2.md b/doc/repository-spec-v2.md
index 55ccbb0..224aa2d 100644
--- a/doc/repository-spec-v2.md
+++ b/doc/repository-spec-v2.md
@@ -78,7 +78,7 @@
 coming from. Including a URL allowing operators to reach owners/authors of the
 client is good practice.
 
- * `User-Agent: my-pub-bot/1.2.3 (+https://github.com/organization/<repository)`
+ * `User-Agent: my-pub-bot/1.2.3 (+https://github.com/organization/<repository>)`
 
 The `User-Agent` header also allows package repository to determine how many
 different clients would be affected by an API change.