Update openapi spec to fix incorrect root of endpoints, not cve/cve

spec/openapi.yaml

@@ -10,7 +10,7 @@ servers:
   - url: https://api.eclipse.org/cve
     description: Production endpoint for the membership portal data
 paths:
-  /cve:
+  "":
     get:
       tags:
         - CVEs
@@ -25,7 +25,7 @@ paths:
                 $ref: "#/components/schemas/cves"
         500:
           description: Error while retrieving data
-  /cve/{id}:
+  /{id}:
     parameters:
       - name: id
         in: path