github: update CI jobs

Author: vk2seb

.github/workflows/main.yml

@@ -3,7 +3,7 @@ name: build & test
 on: [push]
 
 jobs:
-  ubuntu-example-usb-audio:
+  ubuntu-usb-audio:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -13,14 +13,14 @@ jobs:
       - run: yosys --version
       - run: |
           pdm install
-          pdm build_example_usb_audio
+          pdm build_usb_audio
         working-directory: gateware
       - uses: actions/upload-artifact@v3
         with:
           name: example-usb-audio.bit
           path: gateware/build/top.bit
 
-  ubuntu-example-dsp-svf:
+  ubuntu-bitstream-dsp-nco:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -30,14 +30,14 @@ jobs:
       - run: yosys --version
       - run: |
           pdm install
-          pdm build_example_svf
+          pdm build_dsp_core nco
         working-directory: gateware
       - uses: actions/upload-artifact@v3
         with:
           name: example-dsp-svf.bit
           path: gateware/build/top.bit
 
-  ubuntu-example-dsp-vca:
+  ubuntu-sim-dsp-nco:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -47,9 +47,5 @@ jobs:
       - run: yosys --version
       - run: |
           pdm install
-          pdm build_example_vca
+          pdm sim_dsp_core nco
         working-directory: gateware
-      - uses: actions/upload-artifact@v3
-        with:
-          name: example-dsp-vca.bit
-          path: gateware/build/top.bit