Fix CI check for !shards

Author: oprypin

.github/workflows/main.yml

@@ -70,7 +70,7 @@ jobs:
         if: ${{ contains(matrix.config.shards, '.') }}
       - run: |
           ! shards --version
-        if: ${{ matrix.config.shards == 'false' }}
+        if: ${{ contains(matrix.config.shards, 'false') }}
       - run: |
           shards build
         working-directory: test-project

.github/workflows/release.yml

@@ -70,7 +70,7 @@ jobs:
         if: ${{ contains(matrix.config.shards, '.') }}
       - run: |
           ! shards --version
-        if: ${{ matrix.config.shards == 'false' }}
+        if: ${{ contains(matrix.config.shards, 'false') }}
       - run: |
           shards build
         working-directory: test-project