HDPI-7542: Fix claim form filename to Claim - Claimant 1 (#2135)

Author: arun-hmcts

src/main/java/uk/gov/hmcts/reform/pcs/ccd/service/claimform/ClaimFormDocumentGenerator.java

@@ -17,7 +17,7 @@
 public class ClaimFormDocumentGenerator {
 
     static final String TEMPLATE_ID = "CV-PCS-CLM-ENG-Claim-Pack.docx";
-    static final String OUTPUT_FILENAME = "Claim form";
+    static final String OUTPUT_FILENAME = "Claim - Claimant 1";
 
     private final DocAssemblyService docAssemblyService;