ci: Fix typos (astarte-platform#1811)

Signed-off-by: Francesco Noacco <francesco.noacco@secomind.com>

Author: noaccOS

.github/workflows/publish-snapshot-to-dockerhub-workflow.yaml

@@ -57,7 +57,7 @@ jobs:
 
   build_snapshot:
     name: Push Docker images to Docker Hub
-    runs-on: ${{ matrix.platform }}
+    runs-on: ${{ matrix.platform.os }}
     permissions:
       packages: write
       contents: read

.github/workflows/publish-tool-snapshot-to-dockerhub-workflow.yaml

@@ -15,7 +15,7 @@ on:
   workflow_dispatch:
 
 jobs:
-  push_tool_snapshot_to_registry:
+  build_snapshot:
     name: Push Docker images of Astarte tools to Docker Hub
     runs-on: ${{ matrix.platform.os }}
     permissions: