fix: Inspect Image Manifest 404

[MrXhh]

1) selected image tag: Inspect Image Manifest 2) Request to http://localhost:5000/v2/xxx/manifests/xxx failed with status 404: Not Found

[bwateratmsft]

I was not able to reproduce the original 404 issue on any registries I tried. What registry are you using where you are seeing it? (I typically use the registry:2 image when testing a localhost registry)

[MrXhh]

I was not able to reproduce the original 404 issue on any registries I tried. What registry are you using where you are seeing it? (I typically use the registry:2 image when testing a localhost registry)我无法在我尝试的任何注册表上重现原始的404问题。你在哪里看到的是什么注册表？（我通常在测试本地主机注册表时使用 registry:2 镜像）

1. start registry: docker run -d -p 5000:5000 --name registry registry:2
2. build image: docker buildx build --platform linux/386,linux/amd64 ...
3. selected image tag: Inspect Image Manifest
4. Request to http://localhost:5000/v2/xxx/manifests/xxx failed with status 404: Not Found

[bwateratmsft]

I pushed the image inbetween step 2 and 3 but still wasn't able to reproduce the 404. I'm concerned about changing the accept header here because it affects all requests to V2 registries, not just the image manifest requests.

[MrXhh]

multi-platform-registry-404.zip

[bwateratmsft]

Thanks, I am able to reproduce now. I will try your fix.

[MrXhh]

@microsoft-github-policy-service agree

[bwateratmsft]

Looks great, thanks for the contribution @MrXhh!