Bug/Problem: When two exceptions are configured for the same license name and different crates, only one exception is used.

### Describe the bug Not sure if this is a bug or a feature. In deny.toml I have these two exceptions: ```TOML [[licenses.exceptions]] allow = ["CDLA-Permissive-2.0"] name = "webpki-roots" [[licenses.exceptions]] allow = ["CDLA-Permissive-2.0"] name = "webpki-roots-certs" ``` When I am running ```cargo deny check licenses``` I would expect to see no errors but instead I am getting an error ``` error[rejected]: failed to satisfy license requirements ┌─ /home/dawid/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/webpki-root-certs-1.0.7/Cargo.toml:26:12 license = "CDLA-Permissive-2.0" │ ━━━━━━━━━━━━━━━━━━━ │ │ │ rejected: license is not explicitly allowed │ ├ CDLA-Permissive-2.0 - Community Data License Agreement Permissive 2.0: ├ - No additional metadata available for license ├ webpki-root-certs v1.0.7 ``` and a warning ``` warning[license-exception-not-encountered]: license exception was not encountered ┌─ /home/dawid/Workspace/contextforge-gateway-rs/deny.toml:13:9 │ 13 │ name = "webpki-roots-certs" │ ━━━━━━━━━━━━━━━━━━ unmatched license exception ``` I would expect no errors and no warnings. When I remove one of the warnings, it works as expected from ```cargo deny``` perspective. I get one error and no warnings. ### To reproduce Add two license exceptions for the same license name and different crates. ### cargo-deny version cargo-deny 0.19.6 ### What OS were you running cargo-deny on? Linux ### Additional context _No response_