generated images do not work with GitHub Pages and static export

### Link to the code that reproduces this issue https://github.com/lifeiscontent/lifeiscontent.net ### To Reproduce I think due to the og images not having a file extension in the output, GitHub pages does not properly serve the generated images. they work great with `next dev` but after deploying to GitHub pages it seems to serve the file as an octet-stream file ### Current vs. Expected behavior expected behavior would be to have file extensions during static export so static file providers handle it gracefully. ### Provide environment information ```bash Operating System: Platform: darwin Arch: arm64 Version: Darwin Kernel Version 24.5.0: Tue Apr 22 19:54:49 PDT 2025; root:xnu-11417.121.6~2/RELEASE_ARM64_T6000 Available memory (MB): 65536 Available CPU cores: 10 Binaries: Node: 22.17.1 npm: 10.9.2 Yarn: N/A pnpm: 10.13.1 Relevant Packages: next: 15.4.4 // Latest available version is detected (15.4.4). eslint-config-next: 15.4.4 react: 19.1.1 react-dom: 19.1.1 typescript: 5.8.3 Next.js Config: output: export ``` ### Which area(s) are affected? (Select all that apply) Output ### Which stage(s) are affected? (Select all that apply) Other (Deployed) ### Additional context _No response_