Documentation/crc32.txt: small typo fix

Upper case the first word.

Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
diff --git a/Documentation/crc32.txt b/Documentation/crc32.txt
index 8a6860f..7542220 100644
--- a/Documentation/crc32.txt
+++ b/Documentation/crc32.txt
@@ -1,5 +1,5 @@
 =================================
-brief tutorial on CRC computation
+Brief tutorial on CRC computation
 =================================
 
 A CRC is a long-division remainder.  You add the CRC to the message,