blog: nixos-kernel-hacking: use "c" syntax highlighting for device tree files

content/blog/DRAFT-2024-11-15-nixos-kernel-hacking.md

@@ -98,7 +98,7 @@ distros like postmarketOS fix this by patching the device tree file like so:
 
 this patch can alternately be represented as a [Device Tree Overlay][Device Tree Overlay] (DTO):
 
-```dts
+```c
 // file: rk3399-pinephone-pro-lradc-fix.dtso
 
 // boilerplate required by the device tree compiler.
@@ -280,7 +280,7 @@ but we still have to associate the driver with a specific device if we want it t
 add the following Device Tree Overlay to `hardware.deviceTree.overlays`,
 as we did earlier with the battery DTO:
 
-```dts
+```c
 /dts-v1/;
 /plugin/;