fix(deps): update github.com/grpc-ecosystem/grpc-gateway/v2 digest to df4d666 (#229)

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

Author: renovate[bot]

otlp/go.mod

@@ -3,7 +3,7 @@ module go.opentelemetry.io/proto/otlp
 go 1.22.0
 
 require (
-	github.com/grpc-ecosystem/grpc-gateway/v2 v2.24.1-0.20241217191332-ad43171ba0b7
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.24.1-0.20241219161738-df4d6666e470
 	google.golang.org/grpc v1.69.2
 	google.golang.org/protobuf v1.36.0
 )

otlp/go.sum

@@ -8,8 +8,8 @@ github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
-github.com/grpc-ecosystem/grpc-gateway/v2 v2.24.1-0.20241217191332-ad43171ba0b7 h1:CZlpBG0S3YTieIdam8Db9Z0gBgU3JuzN9zFIo7t0WTc=
-github.com/grpc-ecosystem/grpc-gateway/v2 v2.24.1-0.20241217191332-ad43171ba0b7/go.mod h1:HYggR0B7Kaj6uEuVdg7PoQm51McagaPwlhggJHro8Ao=
+github.com/grpc-ecosystem/grpc-gateway/v2 v2.24.1-0.20241219161738-df4d6666e470 h1:Byq91FpFFKDtqBCGMAW1G9M9fDAOyXNb/pW8vo2xEZ0=
+github.com/grpc-ecosystem/grpc-gateway/v2 v2.24.1-0.20241219161738-df4d6666e470/go.mod h1:oMdpwGIhk3PMYollBz8X75QmXZTlxvgZ3swrJV4Ejxw=
 go.opentelemetry.io/otel v1.31.0 h1:NsJcKPIW0D0H3NgzPDHmo0WW6SptzPdqg/L1zsIm2hY=
 go.opentelemetry.io/otel v1.31.0/go.mod h1:O0C14Yl9FgkjqcCZAsE053C13OaddMYr/hz6clDkEJE=
 go.opentelemetry.io/otel/metric v1.31.0 h1:FSErL0ATQAmYHUIzSezZibnyVlft1ybhy4ozRPcF2fE=