docs: net: bareudp: fix spelling and grammar mistakes

The BareUDP documentation had several grammar and spelling mistakes,
making it harder to read. This patch fixes those errors to improve
clarity and readability for developers.

Signed-off-by: Vyshnav Ajith <puthen1977@gmail.com>
Link: https://patch.msgid.link/20241121224827.12293-1-puthen1977@gmail.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>