ci: ignore backports while checking docs (#26962)

[skip ci]
diff --git a/.github/helper/documentation.py b/.github/helper/documentation.py
index 9cc4663..b4a4ba1 100644
--- a/.github/helper/documentation.py
+++ b/.github/helper/documentation.py
@@ -32,11 +32,15 @@
 
 	if response.ok:
 		payload = response.json()
-		title = payload.get("title", "").lower()
+		title = payload.get("title", "").lower().strip()
 		head_sha = payload.get("head", {}).get("sha")
 		body = payload.get("body", "").lower()
 
-		if title.startswith("feat") and head_sha and "no-docs" not in body:
+		if (title.startswith("feat")
+			and head_sha
+			and "no-docs" not in body
+			and "backport" not in body
+		):
 			if docs_link_exists(body):
 				print("Documentation Link Found. You're Awesome! 🎉")