updates intersphinx references for docs links (#71921)

* DOCS: updates intersphinx references for docs links
* TESTS: Raise the number of bytes scanned to determine if a file is binary. The newest ansible-2.10.inv file has its first null byte at position 2261. 4096 is still a cheap chunksize to read so it still makes sense to raise this.

Co-authored-by: Alicia Cozine <acozine@users.noreply.github.com>
Co-authored-by: Toshio Kuratomi <a.badger@gmail.com>

test/lib/ansible_test/_internal/util.py

@@ -500,7 +500,7 @@ def is_binary_file(path):
 
     with open_binary_file(path) as path_fd:
         # noinspection PyTypeChecker
-        return b'\0' in path_fd.read(2048)
+        return b'\0' in path_fd.read(4096)
 
 
 def generate_password():