Fixed some grammar issues

imprint.md

@@ -14,4 +14,4 @@ Phone: **[+1 555-555-5555](tel:1-555-555-5555)** <br>
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 ### Copyright
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+The contents and works on this website are subject to American copyrights laws and open-source code licenses. Any kind of use outside the limits of copyright laws and code licenses requires the written consent of the respective author or authors.