[Example] ggml: update supported matrix

[juntao]

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Commit 6d862d6ca49096af4821910b33773c8bb7f083a4

Key Changes:

• Added a table to the README.md file in the wasmedge-ggml-llama-embedding directory.
• The table lists the supported matrix, including OS, Arch, GPU, and Framework.
• The table also includes additional information and comments for each supported configuration.
• Added a section mentioning plans to support Linux amd64 with AMD GPU and OpenCL framework in the future.
• The patch mentions that the version has been verified on Nvidia Jetson AGX Orin and Intel i7-10700 + Nvidia GTX 1080 8G GPU platforms.

Potential Problems:

• No potential problems were identified in the patch.