Update webservice-ssrf.yaml (#3380)

I corrected the word runnig to running in the message(:

Co-authored-by: Vasilii Ermilov <inkz@xakep.ru>

scala/play/security/webservice-ssrf.yaml

@@ -27,7 +27,7 @@ rules:
     A parameter being passed directly into `WSClient` most likely lead to SSRF.
     This could allow an attacker to send data to their own server, potentially exposing sensitive data
     sent with this request.
-    They could also probe internal servers or other resources that the server runnig this code can access.
+    They could also probe internal servers or other resources that the server running this code can access.
     Do not allow arbitrary hosts. Instead, create an allowlist for approved hosts hardcode the correct
     host.
   metadata: