Bump AWSSDK.SimpleNotificationService from 3.7.3.50 to 3.7.3.76 (#1317)

Bumps [AWSSDK.SimpleNotificationService](https://github.com/aws/aws-sdk-net) from 3.7.3.50 to 3.7.3.76.
- [Release notes](https://github.com/aws/aws-sdk-net/releases)
- [Commits](https://github.com/aws/aws-sdk-net/commits)

---
updated-dependencies:
- dependency-name: AWSSDK.SimpleNotificationService
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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src/HealthChecks.Aws.Sns/HealthChecks.Aws.Sns.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="AWSSDK.SimpleNotificationService" Version="3.7.3.50" />
+    <PackageReference Include="AWSSDK.SimpleNotificationService" Version="3.7.3.76" />
     <PackageReference Include="Microsoft.Extensions.Diagnostics.HealthChecks" Version="6.0.6" />
   </ItemGroup>