Bump image version to 2026.1.3 (#2381)

[Release notes for
2026.1.3](https://github.com/PhotonVision/photon-image-modifier/releases/tag/v2026.1.3)
- Provisional orange pi 6 plus image builder by @guineawheek in
https://github.com/PhotonVision/photon-image-modifier/pull/126
- Install usbtop to images by @samfreund in
https://github.com/PhotonVision/photon-image-modifier/pull/129
- Shrunk our Rubik Pi 3 image by @crschardt in
https://github.com/PhotonVision/photon-image-modifier/pull/128

This PR includes a downsized Rubik Pi image and usbtop shipped with the
image for debugging. It also adds the opi6 image (note no OD support
yet; platform is detected as a generic arm64 target).

.github/workflows/build.yml

@@ -10,7 +10,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  IMAGE_VERSION: v2026.1.2
+  IMAGE_VERSION: v2026.1.3
 
 jobs:
 
@@ -550,6 +550,12 @@ jobs:
             plat_override: LINUX_RK3588_64
             image_url: https://github.com/PhotonVision/photon-image-modifier/releases/download/$IMAGE_VERSION/photonvision_rock5c.img.xz
             minimum_free_mb: 1024
+          - os: ubuntu-24.04-arm
+            artifact-name: LinuxArm64
+            image_suffix: orangepi6plus
+            plat_override: LINUX_AARCH64
+            image_url: https://github.com/PhotonVision/photon-image-modifier/releases/download/$IMAGE_VERSION/photonvision_opi6plus.img.xz
+            minimum_free_mb: 1024
           - os: ubuntu-24.04-arm
             artifact-name: LinuxArm64
             image_suffix: rubikpi3