ci: remove patch version from crystal-lang/install-crystal

latest patch will be automatically installed which is 1.8.1 https://github.com/crystal-lang/install-crystal

.github/workflows/ci.yml

@@ -52,7 +52,7 @@ jobs:
           submodules: true
 
       - name: Install Crystal
-        uses: crystal-lang/install-crystal@v1.8.0
+        uses: crystal-lang/install-crystal@v1.8
         with:
           crystal: ${{ matrix.crystal }}
 

.github/workflows/container-release.yml

@@ -25,7 +25,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install Crystal
-        uses: crystal-lang/install-crystal@v1.8.0
+        uses: crystal-lang/install-crystal@v1.8
         with:
           crystal: 1.9.2