Update ci.yml (#1010)

test julia v1.9

Author: Affie

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
       matrix:
         version:
           - '1.8'
-          - '~1.9.0-0'
+          - '1.9'
           - 'nightly'
         os:
           - ubuntu-latest
@@ -83,7 +83,7 @@ jobs:
       - name: Setup julia
         uses: julia-actions/setup-julia@v1
         with:
-          version: 1.8
+          version: 1.9
           arch: x64
 
       - name: Build Docs