docs: drop redundant text in the Internet Access Required section (#7521)

Co-authored-by: Jeremy Long <[email protected]>

Author: brlin-tw

src/site/markdown/data/index.md

@@ -1,6 +1,6 @@
 # Internet Access Required
 
-Dependency-check requires access, by default, requires access to several externally
+Dependency-check, by default, requires access to several externally
 hosted resources.
 
 ## The NVD Database