[no ci] Workflow: update uboot build script

.github/workflows/uboot.yml

@@ -7,15 +7,12 @@ jobs:
     name: Uboot
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout source
-        uses: actions/checkout@v4
-
       - name: Prepare
         run: |
           sudo apt-get update
           sudo apt-get install gcc-arm-linux-gnueabi
 
-      - name: u-boot-sigmastar
+      - name: Sigmastar
         run: |
           git clone https://github.com/openipc/u-boot-sigmastar.git --depth 1
           cd u-boot-sigmastar
@@ -38,5 +35,4 @@ jobs:
             u-boot-sigmastar/output/u-boot-ssc337-nor.bin
             u-boot-sigmastar/output/u-boot-ssc338q-nand.bin
             u-boot-sigmastar/output/u-boot-ssc338q-nor.bin
-            u-boot-sigmastar/output/u-boot-ssc338q-ram.bin
             u-boot-sigmastar/output/u-boot-ssc377-nor.bin