[clang-tidy] idevicebackup2: use uppercase numeric literals

Found with readability-uppercase-literal-suffix

Signed-off-by: Rosen Penev <rosenp@gmail.com>
diff --git a/tools/idevicebackup2.c b/tools/idevicebackup2.c
index 7cc0535..2f8f1fa 100644
--- a/tools/idevicebackup2.c
+++ b/tools/idevicebackup2.c
@@ -2486,7 +2486,7 @@
 
 				/* print status */
 				if ((overall_progress > 0) && !progress_finished) {
-					if (overall_progress >= 100.0f) {
+					if (overall_progress >= 100.0F) {
 						progress_finished = 1;
 					}
 					print_progress_real(overall_progress, 0);