Chris Evans recently sent a video message to a young boy named Bridger, who saved his sister from a dog attack. Evans promised to send Bridger an official Captain America shield, thanking him for his courageous act.Evans said in the video, “Pal, you’re a hero, what you did was so brave, so selfless — your sister is so lucky to have you as a big brother. Your parents must be so proud of you.”Walker later shared a video of Bridger listening to Evans’s message on her account. The young hero was fittingly wearing a Captain America costume.“Keep being the man you are, we need people like you,” Evan…