[Github workflow] Fix Slurmdbd tempate Github check by pinning typeguard version

An upgrade in AWS CDK dependencies started to use typeguard 4.x, which is failing the template generation. Example failure: https://github.com/aws/aws-parallelcluster/actions/runs/11257806474/job/31369657650?pr=6454

Signed-off-by: Hanwen <[email protected]>

Author: hanwen-cluster

.github/workflows/ci.yml

@@ -202,6 +202,7 @@ jobs:
           python-version: '3.12'
       - name: Install AWS CDK
         run: |
+          pip install typeguard~=2.13
           npm install -g aws-cdk
           pip install -r cloudformation/external-slurmdbd/requirements.txt
       - working-directory: cloudformation/external-slurmdbd