Update dependency YamlDotNet to v18

Author: renovate[bot]

tools/windows/DatadogAgentInstaller/CustomActions.Tests/CustomActions.Tests.csproj

@@ -149,7 +149,7 @@
       <Version>1.27.0</Version>
     </PackageReference>
     <PackageReference Include="YamlDotNet">
-      <Version>17.1.0</Version>
+      <Version>18.0.0</Version>
     </PackageReference>
   </ItemGroup>
   <ItemGroup />

tools/windows/DatadogAgentInstaller/CustomActions/CustomActions.csproj

@@ -117,7 +117,7 @@
       <Version>13.0.4</Version>
     </PackageReference>
     <PackageReference Include="YamlDotNet">
-      <Version>17.1.0</Version>
+      <Version>18.0.0</Version>
     </PackageReference>
   </ItemGroup>
   <ItemGroup>