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Additional information at the source: Microsoft to use SHA-2 exclusively starting May 9, 2021 - Microsoft Tech Community.
As a major move to the more secure SHA-2 algorithm, Microsoft will allow the Secure Hash Algorithm 1 (SHA-1) Trusted Root Certificate Authority to expire. Beginning May 9, 2021 at 4:00 PM Pacific Time, all major Microsoft processes and services—including TLS certificates, code signing and file hashing—will use the SHA-2 algorithm exclusively.
Additional information at the source: Microsoft to use SHA-2 exclusively starting May 9, 2021 - Microsoft Tech Community.