I think I did it but it looks different from the youtube video tutorial I watched here:https://www.youtube.com/watch?v=Y0zgZ4M1Bro



This is what it shows me (it had no green coloured background like in the video):


 "Verified ‘electrum-4.4.6-setup.exe’ with ‘electrum-4.4.6-setup.exe.asc’: 3 valid signatures."


                 Signature created on August 20, 2023 7:18:16 PM
With unavailable certificate:
ID: 0x637DB1E23370F84AFF88CCE03152347D07DA627C
You can search the certificate on a keyserver or import it from a file.

Signature created on August 17, 2023 4:59:29 PM
With unavailable certificate:
ID: 0x0EEDCFD5CAFB459067349B23CA9EEEC43DF911DC
You can search the certificate on a keyserver or import it from a file.

Signature created on August 17, 2023 3:09:34 PM
With certificate:
Thomas Voegtlin (https://electrum.org) <thomasv@electrum.org> (2BD5 824B 7F94 70E6)
The signature is valid and the certificate's validity is fully trusted."