avcodec/cbs_h266_syntax_template: Use correct format specifier

H266RawSliceHeader.num_entry_points is an uint32_t.
Fixes -Wformat warnings:
https://fate.ffmpeg.org/log.cgi?slot=aarch64-osx-clang-1200.0.32.29&time=20240604151047&log=compileSigned-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavcodec/cbs_h266_syntax_template.c

@@ -3426,7 +3426,7 @@ static int FUNC(slice_header) (CodedBitstreamContext *ctx, RWContext *rw,
         current->num_entry_points--;
         if (current->num_entry_points > VVC_MAX_ENTRY_POINTS) {
             av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many entry points: "
-                   "%" PRIu16 ".\n", current->num_entry_points);
+                   "%" PRIu32 ".\n", current->num_entry_points);
             return AVERROR_PATCHWELCOME;
         }
         if (current->num_entry_points > 0) {