Update BouncyCastle to 2.3.1 #1258

Job	Run time
test / EventStore.Client.Streams/ubuntu-latest/net6.0/ci	10m 45s
test / EventStore.Client.PersistentSubscriptions/ubuntu-latest/net6.0/ci	9m 27s
test / EventStore.Client.Operations/ubuntu-latest/net6.0/ci	1m 47s
test / EventStore.Client.UserManagement/ubuntu-latest/net6.0/ci	2m 13s
test / EventStore.Client.ProjectionManagement/ubuntu-latest/net6.0/ci	1m 46s
test / EventStore.Client.Streams/ubuntu-latest/net7.0/ci	10m 55s
test / EventStore.Client.PersistentSubscriptions/ubuntu-latest/net7.0/ci	9m 8s
test / EventStore.Client.Operations/ubuntu-latest/net7.0/ci	2m 29s
test / EventStore.Client.UserManagement/ubuntu-latest/net7.0/ci	2m 45s
test / EventStore.Client.ProjectionManagement/ubuntu-latest/net7.0/ci	1m 27s
test / EventStore.Client.Streams/ubuntu-latest/net8.0/ci	11m 3s
test / EventStore.Client.PersistentSubscriptions/ubuntu-latest/net8.0/ci	9m 32s
test / EventStore.Client.Operations/ubuntu-latest/net8.0/ci	2m 22s
test / EventStore.Client.UserManagement/ubuntu-latest/net8.0/ci	2m 55s
test / EventStore.Client.ProjectionManagement/ubuntu-latest/net8.0/ci	1m 25s
	1h 19m 59s

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