fix: requested changes

.github/actions/spelling/allow.txt

@@ -71,6 +71,7 @@ cabextract
 capnproto
 cbt
 CDNs
+CDX
 ceph
 cfa
 cfea

cve_bin_tool/cli.py

@@ -345,45 +345,48 @@ def main(argv=None):
         choices=["tag", "json", "yaml"],
         help="specify format of software bill of materials (sbom) to generate (default: tag)",
     )
-    output_group.add_argument(
+    vex_output_group = parser.add_argument_group(
+        "Vex Output", "Arguments related to Vex output document."
+    )
+    vex_output_group.add_argument(
         "--vex-output",
         action="store",
         help="Provide vulnerability exchange (vex) filename to generate",
         default="",
     )
-    output_group.add_argument(
+    vex_output_group.add_argument(
         "--vex-type",
         action="store",
         default="",
         choices=["cyclonedx", "csaf", "openvex"],
         help="specify type of vulnerability exchange (vex) to generate (default: cyclonedx)",
     )
-    output_group.add_argument(
+    vex_output_group.add_argument(
         "--product",
         action="store",
         default="",
         help="Product Name",
     )
-    output_group.add_argument(
+    vex_output_group.add_argument(
         "--release",
         action="store",
         default="",
         help="Release Version",
     )
-    output_group.add_argument(
+    vex_output_group.add_argument(
         "--vendor",
         action="store",
         default="",
         help="Vendor/Supplier of Product",
     )
-    output_group.add_argument(
+    vex_output_group.add_argument(
         "-rr",
         "--revision-reason",
         action="store",
         default="",
         help="a reason for the update to the vex document should be specified in double quotes",
     )
-    output_group.add_argument(
+    vex_output_group.add_argument(
         "--filter-triage",
         action="store_true",
         default=False,