fix(agents-md): add language tag to Mergify command fenced block

🤖 Generated by [robots](https://vyos.io)

1 files changed, 1 insertions, 1 deletions

diff --git a/AGENTS.md b/AGENTS.md
index 2bbaf6aa..cd7062b8 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -63,7 +63,7 @@ One long-lived branch per VyOS release line. Branch names are constellations sor
 
 PRs target `current`. After merge, request backports via a **post-merge comment** on the PR:
 
-```
+```text
 @Mergifyio backport circinus
 @Mergifyio backport sagitta
 ```