Fix failed CI job

Avoids compile error in Crystal v1.9: ``` Error: type must be Ameba::Severity, not (Ameba::Severity | Nil) ``` See <https://github.com/GrottoPress/shield/actions/runs/5629199930/job/15253904670>.
GrottoPress · Jul 22, 2023 · 0ab896b · 0ab896b
1 parent 245f15e
commit 0ab896b
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
@@ -55,7 +55,7 @@ jobs:
           key: ${{ runner.os }}-shards-${{ hashFiles('shard.yml') }}
           restore-keys: ${{ runner.os }}-shards-
       - name: Install shards
-        run: shards update
+        run: shards update --skip-postinstall --skip-executables
       - name: Install Postgresql
         run: sudo apt -y install postgresql
       - name: Start Postgresql
@@ -91,7 +91,7 @@ jobs:
           key: ${{ runner.os }}-shards-${{ hashFiles('shard.yml') }}
           restore-keys: ${{ runner.os }}-shards-
       - name: Install shards
-        run: shards update
+        run: shards update --skip-postinstall --skip-executables
       - name: Install CockroachDB
         run: |
           sudo apt -y install tar wget