Fix use-cache check

Signed-off-by: Guian Gumpac <[email protected]>

.github/workflows/install-valkey/action.yml

@@ -67,7 +67,7 @@ runs:
               echo 'export PATH=/usr/local/bin:$PATH' >>~/.bash_profile
 
         - name: Verify Valkey installation and symlinks
-          if: ${{ !inputs.use-cache || !contains(inputs.engine-version, '-rc') }}
+          if: ${{ inputs.use-cache == false || !contains(inputs.engine-version, '-rc') }}
           shell: bash
           run: |
               # In Valkey releases, the engine is built with symlinks from valkey-server and valkey-cli