docs: reword incorrect L7 policy description

[peterj]

Remove the extra $ characters in the paths (I didn't see this documented anywhere, so I am assuming it might be a left over from previous versions?).

Also, I am fixing incorrect description of the GET /public policy in the L7 section.

[qmonnet]

The fix for the description of the GET /public sounds good.

For the dollars, I'm not sure this is a mistake, maybe just something that's missing documentation. I can see some other examples using it, including in tests (pkg/policy/api/utils_test.go). My guess is that it means the path should match until the end, and not just be a prefix. So please let's clarify whether this is actually something that needs an update before removing these $.

[qmonnet]

From a quick look at the doc (https://docs.cilium.io/en/latest/security/policy/language/#layer-7-examples):

Path is an extended POSIX regex matched against the path of a request.

So probably nothing to change on that side.

[peterj]

Thanks @qmonnet -- I removed those changes.

[qmonnet]

Looks good, thank you!