Update ci.yml

Author: jordanmontt

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        smalltalk: [ Pharo64-9.0, Pharo64-10 ]
+        smalltalk: [ Pharo64-10 ]
     name: ${{ matrix.smalltalk }}
     steps:
       - uses: actions/checkout@v2
@@ -24,4 +24,4 @@ jobs:
           smalltalk-version: ${{ matrix.smalltalk }}
       - run: smalltalkci -s ${{ matrix.smalltalk }}
         shell: bash
-        timeout-minutes: 15
+        timeout-minutes: 15