Search for the rare decays <inline-formula><tex-math id="M1">\begin{document}${\boldsymbol W^{+} \rightarrow \boldsymbol D_s^{+} \gamma}$\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="CPC-2022-0603_M1.jpg"/><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="CPC-2022-0603_M1.png"/></alternatives></inline-formula> and <inline-formula><tex-math id="M2">\begin{document}${\boldsymbol Z \rightarrow \boldsymbol D^0 \gamma}$\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="CPC-2022-0603_M2.jpg"/><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="CPC-2022-0603_M2.png"/></alternatives></inline-formula> at LHCb

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