Fixed the members e2e test

no issue

- Added a missing `'content-length': anyString` as it's not returning a stable value
- Removed snapshots that aren't relevant anymore

test/e2e-api/admin/members.test.js

@@ -178,7 +178,8 @@ describe('Members API', function () {
             .get('members/?order=email_open_rate%20asc')
             .expectStatus(200)
             .matchHeaderSnapshot({
-                etag: anyEtag
+                etag: anyEtag,
+                'content-length': anyString
             })
             .matchBodySnapshot({
                 members: new Array(8).fill(memberMatcherShallowIncludes)