Documentation: Remove duplicate word size in bootconfig

Remove duplicate word size in bootconfig.rst

Signed-off-by: Sumeet Pawnikar <sumeet4linux@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20250705151618.4806-1-sumeet4linux@gmail.com

Author: sumeet4linux

Documentation/admin-guide/bootconfig.rst

@@ -265,7 +265,7 @@ The final kernel cmdline will be the following::
 Config File Limitation
 ======================
 
-Currently the maximum config size size is 32KB and the total key-words (not
+Currently the maximum config size is 32KB and the total key-words (not
 key-value entries) must be under 1024 nodes.
 Note: this is not the number of entries but nodes, an entry must consume
 more than 2 nodes (a key-word and a value). So theoretically, it will be