ci: fix release action (#49)

Author: jyecusch

.github/workflows/publish-on-release.yml

@@ -29,7 +29,7 @@ jobs:
       - name: Find and Replace Version templates
         run: |
           sed -i.bak 's/${VERSION}/${{ steps.normalize_version.outputs.VERSION }}/g' src/Nitric.Sdk/Nitric.Sdk.csproj
-          rm Nitric.Sdk/Nitric.Sdk.csproj.bak
+          rm src/Nitric.Sdk/Nitric.Sdk.csproj.bak
       - name: Exclude Test Project
         run: dotnet sln remove Nitric.Test
       - name: Restore Dependencies