chore(vale): disable red hat's merge conflict check

This check is rudimentary and incorrectly tags RST titles as merge
conflict notes. As such it should be disabled until it's made aware of
RST syntax.

Signed-off-by: Randolph Sapp <rs@ti.com>

Author: StaticRocket

.vale.ini

@@ -9,3 +9,4 @@ Vocab = PSDK
 BasedOnStyles = RedHat
 RedHat.PascalCamelCase = NO
 RedHat.GitLinks = NO
+RedHat.MergeConflictMarkers = NO