a quick google search says the alpha acids for herbrucker is 1.5-3.5% and hallertau is 3.0-5.0%
So if you used hallertau for your bittering hops it will be a bit more bitter than if you used herbrucker but it really depends on how much hallertau you used. Honestly though they're both a pretty low alpha acid percentage so I'm sure your beer will be fine.