Add new proprietary license rule

Signed-off-by: Philippe Ombredanne <pombredanne@nexb.com>

Author: pombredanne

src/licensedcode/data/rules/proprietary-license_676.RULE

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+Except for any logos, trade marks, service marks, names, insignias, emblems, the Singapore state crest and Singapore national coat of arms, and/or any other graphic, image or sound which is used to identify any Singapore public sector agency or is associated with any Singapore public sector agency, or which belongs to a third party such as Inc., and/or any asset or code identified by the Government Technology Agency (“GovTech”) as not licensed to you (such identification may come in the form of a filename labelled with “restricted” or similar phrasing), the contents of this repository are provided under the MIT License SUBJECT FURTHER TO THE FOLLOWING:
+
+(1) The MIT License and the terms herein (collectively, the “Terms”) shall be governed by the laws of Singapore. Any dispute arising out of or in connection with the Terms, including any question regarding its existence, validity or termination, shall be referred to and finally resolved by arbitration administered by the Singapore International Arbitration Centre (“SIAC”) in accordance with the Arbitration Rules of the Singapore International Arbitration Centre (“SIAC Rules”) for the time being in force, which rules are deemed to be incorporated by reference in this clause. The seat of arbitration shall be Singapore. The Tribunal shall consist of one (1) arbitrator. The language of the arbitration shall be English.

src/licensedcode/data/rules/proprietary-license_676.yml

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+license_expression: proprietary-license
+is_license_notice: yes
+notes: Since this MIT rider is not clear, this is detected as proprietary for now See https://github.com/opengovsg/FormSG/blob/dbcb0f96c645a95976e69b4eb6ba11b85915bdd5/LICENSE.md