Fix XML formatting for secrets.json inclusion

Author: Guacam-Ole

GassiMeter.csproj

@@ -24,7 +24,7 @@
         <CopyToOutputDirectory>Always</CopyToOutputDirectory>
       </Content>
       <None Remove="secrets.json" />
-      <Content Include="secrets.json" Condition="Exists('secrets.json')>
+      <Content Include="secrets.json" Condition="Exists('secrets.json')">
         <CopyToOutputDirectory>Always</CopyToOutputDirectory>
       </Content>
     </ItemGroup>