Update distribution ref to main branch

Signed-off-by: Emily Casey <emily.casey@docker.com>

Author: ekcasey

go.mod

@@ -5,7 +5,7 @@ go 1.23.7
 require (
 	github.com/containerd/containerd/v2 v2.0.4
 	github.com/containerd/platforms v1.0.0-rc.1
-	github.com/docker/model-distribution v0.0.0-20250822162120-b69671b0a882
+	github.com/docker/model-distribution v0.0.0-20250822164750-dcd03ba922e7
 	github.com/elastic/go-sysinfo v1.15.3
 	github.com/google/go-containerregistry v0.20.3
 	github.com/gpustack/gguf-parser-go v0.14.1

go.sum

@@ -38,8 +38,8 @@ github.com/docker/distribution v2.8.3+incompatible h1:AtKxIZ36LoNK51+Z6RpzLpddBi
 github.com/docker/distribution v2.8.3+incompatible/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w=
 github.com/docker/docker-credential-helpers v0.8.2 h1:bX3YxiGzFP5sOXWc3bTPEXdEaZSeVMrFgOr3T+zrFAo=
 github.com/docker/docker-credential-helpers v0.8.2/go.mod h1:P3ci7E3lwkZg6XiHdRKft1KckHiO9a2rNtyFbZ/ry9M=
-github.com/docker/model-distribution v0.0.0-20250822162120-b69671b0a882 h1:75C94TdViNfaNjy3+Zyq+Mpy18x0qAO9Idf2fG0diOc=
-github.com/docker/model-distribution v0.0.0-20250822162120-b69671b0a882/go.mod h1:dThpO9JoG5Px3i+rTluAeZcqLGw8C0qepuEL4gL2o/c=
+github.com/docker/model-distribution v0.0.0-20250822164750-dcd03ba922e7 h1:dOk1UTVMyDHNG4WFS8jnAtfKdPUE3QaMWNvrzRoK/dI=
+github.com/docker/model-distribution v0.0.0-20250822164750-dcd03ba922e7/go.mod h1:dThpO9JoG5Px3i+rTluAeZcqLGw8C0qepuEL4gL2o/c=
 github.com/elastic/go-sysinfo v1.15.3 h1:W+RnmhKFkqPTCRoFq2VCTmsT4p/fwpo+3gKNQsn1XU0=
 github.com/elastic/go-sysinfo v1.15.3/go.mod h1:K/cNrqYTDrSoMh2oDkYEMS2+a72GRxMvNP+GC+vRIlo=
 github.com/elastic/go-windows v1.0.2 h1:yoLLsAsV5cfg9FLhZ9EXZ2n2sQFKeDYrHenkcivY4vI=