docs: driver-api/thermal/intel_dptf: Use copyright symbol

Using a substitution pattern of "|copy|" without including
isonum.txt causes a doc build warning.

Using the symbol "©" itself is a better choice for those
who read .rst sources.

Reported by: Randy Dunlap <[email protected]>

Fixes: 16c02447f3e1 ("Documentation: thermal: DPTF Documentation")
Suggested-by: Jonathan Corbet <[email protected]>
Signed-off-by: Akira Yokosawa <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Srinivas Pandruvada <[email protected]>
Cc: [email protected]
Cc: [email protected]
Acked-by: Randy Dunlap <[email protected]>
Tested-by: Randy Dunlap <[email protected]>
Signed-off-by: Jonathan Corbet <[email protected]>

0 files changed, 0 insertions, 0 deletions