nocrypto build fails

``` go build -tags nocrypto -ldflags '-s -w -linkmode external -extldflags -static -X main.Tag=0 -X main.Commit=0 -X '\''main.BuildTime=Aug 11 2024, 17:06:41'\''' ./cmd/mautrix-slack # maunium.net/go/mautrix/bridgev2/matrix ../go/pkg/mod/maunium.net/go/mautrix@v0.19.1-0.20240807113800-45527281cc18/bridgev2/matrix/connector.go:141:30: cannot use br (variable of type *Connector) as *bridge.Bridge value in argument to NewCryptoHelper ```