chore(deps): update grpc-dotnet monorepo to v2.61.0 (#128)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.config/dotnet-tools.json

@@ -3,7 +3,7 @@
   "isRoot": true,
   "tools": {
     "dotnet-grpc": {
-      "version": "2.60.0",
+      "version": "2.61.0",
       "commands": [
         "dotnet-grpc"
       ]

Envoy/Envoy.csproj

@@ -10,8 +10,8 @@
     <PackageReference Include="Google.Protobuf" Version="3.25.3" />
     <PackageReference Include="Grpc" Version="2.46.6" />
     <PackageReference Include="Grpc.Core" Version="2.46.6" />
-    <PackageReference Include="Grpc.Net.ClientFactory" Version="2.60.0" />
-    <PackageReference Include="Grpc.Net.Common" Version="2.60.0" />
+    <PackageReference Include="Grpc.Net.ClientFactory" Version="2.61.0" />
+    <PackageReference Include="Grpc.Net.Common" Version="2.61.0" />
     <PackageReference Include="Grpc.Tools" Version="2.62.0" PrivateAssets="All" />
   </ItemGroup>