Update .lycheeignore to exclude broken link (#49)

* Update .lycheeignore

.lycheeignore

@@ -6,6 +6,7 @@ http://www.first.org/cvss/v2.0/
 https://bytebuddy.net/byte-buddy
 https://code.revelc.net/revelc/formatter-maven-plugin
 https://errorprone.info/error_prone_annotations
+https://git-scm.com/documentation
 https://github.com/eclipse-ee4j/jaf/jakarta.activation-api
 https://github.com/eclipse-ee4j/jaxb-api/jakarta.xml.bind-api
 https://github.com/google/guava/.*
@@ -15,6 +16,8 @@ https://logging.apache.org/log4j/2.x/log4j/.*
 http://objenesis.org/objenesis
 https://pmd.github.io/latest/pmd_userdocs_cpd.html
 https://www.antlr.org/antlr4-runtime/
+http://www.gnu.org/licenses
+https://www.gnu.org/licenses/old-licenses
 http://www.mojohaus.org/.*
 http://www.mozilla.org/MPL/2.0/
 # prone to long timeouts