Merge pull request #319 from yrabbit/nextpnr

Use nextpnr 0.8

Author: yrabbit

.github/workflows/chipdb.yml

@@ -272,7 +272,7 @@ jobs:
       fail-fast: false
       matrix:
         yosys: [main, yosys-0.44]
-        nextpnr: [master, nextpnr-0.7]
+        nextpnr: [master, nextpnr-0.8]
     steps:
     - uses: actions/checkout@v4
     - name: Download python package