Update cambridge-university-press-author-date-cambridge-a.csl

[POBrien333]

fix minor issue: https://forums.zotero.org/discussion/121185/extra-comma-in-references#latest

[github-actions]

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😟 There are some issues with your submission.

2 tests failed

The CSL Style Repository may not contain any duplicate style titles

expected: {}
     got: {"cambridge university press, cambridgeb (author-date)"=>["cambridge-university-press-author-date-cambridge-a", "cambridge-university-press-author-date"]}

(compared using ==)

Diff:
@@ -1 +1,2 @@
+"cambridge university press, cambridgeb (author-date)" => ["cambridge-university-press-author-date-cambridge-a", "cambridge-university-press-author-date"],

cambridge-university-press-author-date-cambridge-a: style ID must be of the form "http://www.zotero.org/styles/" + style file name (without ".csl" extension, e.g. "http://www.zotero.org/styles/apa")

expected: "http://www.zotero.org/styles/cambridge-university-press-author-date-cambridge-a"
     got: "http://www.zotero.org/styles/cambridge-university-press-author-date"

(compared using ==)

Please check the test report for details.