replace nightly by lts

Author: theogf

.github/workflows/ci.yml

@@ -16,14 +16,13 @@ jobs:
   test:
     name: Julia ${{ matrix.version }} - ${{ matrix.group }}
     runs-on: ${{ matrix.os }}
-    continue-on-error: ${{ matrix.version == 'nightly' }}
     strategy:
       fail-fast: false
       matrix:
         version:
           - '1'
           - '1.6'
-          - 'nightly'
+          - 'lts'
         os:
           - ubuntu-latest
         arch: