improve docker images, improve ci

Author: Fraccaman

.github/workflows/build-namada.yml

@@ -84,5 +84,5 @@ jobs:
           cache-from: type=gha,scope=${{ matrix.images.cache_scope }}
           cache-to: type=gha,scope=${{ matrix.images.cache_scope }},mode=max
           build-args: |
-            GENESIS_TEMPLATE_VERSION=${{ github.event.inputs.genesis_template_version | '0.46.0-ant' }}
-            GIT_SHA=${{ github.event.inputs.commit | 'main' }}
+            GENESIS_TEMPLATE_VERSION=${{ github.event.inputs.genesis_template_version || '0.46.0-ant' }}
+            GIT_SHA=${{ github.event.inputs.commit || 'main' }}