fix: add missing third party provider defaults

Fixes the issue that icon and provider name are not properly returned by
the backend (and hence not shown in Hanko elements)  when defaults are not
set.

backend/config/config_default.go

@@ -117,14 +117,6 @@ func DefaultConfig() *Config {
 		},
 		ThirdParty: ThirdParty{
 			Providers: ThirdPartyProviders{
-				Google: ThirdPartyProvider{
-					DisplayName:  "Google",
-					AllowLinking: true,
-				},
-				GitHub: ThirdPartyProvider{
-					DisplayName:  "GitHub",
-					AllowLinking: true,
-				},
 				Apple: ThirdPartyProvider{
 					DisplayName:  "Apple",
 					AllowLinking: true,
@@ -133,6 +125,22 @@ func DefaultConfig() *Config {
 					DisplayName:  "Discord",
 					AllowLinking: true,
 				},
+				LinkedIn: ThirdPartyProvider{
+					DisplayName:  "LinkedIn",
+					AllowLinking: true,
+				},
+				Microsoft: ThirdPartyProvider{
+					DisplayName:  "Microsoft",
+					AllowLinking: true,
+				},
+				GitHub: ThirdPartyProvider{
+					DisplayName:  "GitHub",
+					AllowLinking: true,
+				},
+				Google: ThirdPartyProvider{
+					DisplayName:  "Google",
+					AllowLinking: true,
+				},
 			},
 		},
 		Passkey: Passkey{