Update ci.yml

Author: lorenzoh

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '1.6-nightly'
+          - '1.6'
         os:
           - ubuntu-latest
           - macOS-latest
@@ -41,4 +41,4 @@ jobs:
             ${{ runner.os }}-
       - uses: julia-actions/julia-buildpkg@latest
       - uses: julia-actions/julia-runtest@latest
-        continue-on-error: ${{ matrix.version == 'nightly' }}
+        continue-on-error: ${{ matrix.version == 'nightly' }}