Bump PGCG.commonItems from 12.1.5 to 12.1.6 in /ImperatorToCK3 (#1987)

Bumps
[PGCG.commonItems](https://github.com/ParadoxGameConverters/commonItems.NET)
from 12.1.5 to 12.1.6.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/ParadoxGameConverters/PGCG.commonItems/commit/c3df7b4ae131f8b26ea850bbbd0618dde80d4a77"><code>c3df7b4</code></a>
Bump version (<a
href="https://redirect.github.com/ParadoxGameConverters/commonItems.NET/issues/452">#452</a>)</li>
<li><a
href="https://github.com/ParadoxGameConverters/PGCG.commonItems/commit/d0f3588f2e252e76bd17db7798ccc4c2edec6b57"><code>d0f3588</code></a>
Bump NCalcSync from 4.3.0 to 4.3.1 (<a
href="https://redirect.github.com/ParadoxGameConverters/commonItems.NET/issues/451">#451</a>)</li>
<li><a
href="https://github.com/ParadoxGameConverters/PGCG.commonItems/commit/17e8ea1f29f2854b470ccc561e73e62581bf38b3"><code>17e8ea1</code></a>
Bump PGCG.commonItems.SourceGenerators from 1.0.5 to 1.0.6 (<a
href="https://redirect.github.com/ParadoxGameConverters/commonItems.NET/issues/449">#449</a>)</li>
<li><a
href="https://github.com/ParadoxGameConverters/PGCG.commonItems/commit/cdee2b8b60b1b741d815526ce1a44fea6d63b7a4"><code>cdee2b8</code></a>
Bump NCalcSync from 4.2.1 to 4.3.0 (<a
href="https://redirect.github.com/ParadoxGameConverters/commonItems.NET/issues/450">#450</a>)</li>
<li><a
href="https://github.com/ParadoxGameConverters/PGCG.commonItems/commit/d4fbaba7181e696978d52f07df458c040b14420b"><code>d4fbaba</code></a>
Bump NCalcSync from 4.2.0 to 4.2.1 (<a
href="https://redirect.github.com/ParadoxGameConverters/commonItems.NET/issues/448">#448</a>)</li>
<li>See full diff in <a
href="https://github.com/ParadoxGameConverters/commonItems.NET/compare/12.1.5...12.1.6">compare
view</a></li>
</ul>
</details>
<br />


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ImperatorToCK3/ImperatorToCK3.csproj

@@ -38,7 +38,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="PGCG.commonItems" Version="12.1.5" />
+    <PackageReference Include="PGCG.commonItems" Version="12.1.6" />
     <PackageReference Include="PGCG.commonItems.SourceGenerators" Version="1.0.6" />
     <PackageReference Include="Polly" Version="8.4.0" />
     <PackageReference Include="SixLabors.ImageSharp" Version="3.1.4" />