Update ci-3p-aiomysql.yml

Signed-off-by: Miro Stauder <miro@proxysql.com>

.github/workflows/ci-3p-aiomysql.yml

@@ -55,7 +55,7 @@ jobs:
       uses: actions/checkout@v4
       with:
         repository: 'proxysql/proxysql_3p_testing'
-        ref: ${{ env.TESTTREE }}
+        ref: main
         fetch-depth: 1
         path: 'proxysql_3p_testing'
         token: ${{ secrets.GH_TOKEN_PROXYSQL }}
@@ -98,6 +98,7 @@ jobs:
         cd proxysql_3p_testing/
         ./setup.sh test_${{ env.TESTNAME }}/${{ env.TESTNAME }}
         git switch ${{ env.TESTTREE }}
+        git pull
         git config user.email "GH-Actions@proxysql.com"
         git config user.name "GH-Actions"
         git rebase main -f -s recursive -X theirs