fix: correct badge URL casing and upgrade codecov action to v5 (#38)

- Fix SecBear casing in CI and Codecov badge URLs
- Upgrade codecov-action from v4 to v5 (better GitHub App integration)
- Pass token via `with` instead of `env` (v5 convention)

Author: SecBear

.github/workflows/ci.yml

@@ -41,12 +41,11 @@ jobs:
       - name: Generate coverage
         run: cargo tarpaulin --workspace --out xml --output-dir coverage/
       - name: Upload to Codecov
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v5
         with:
           files: coverage/cobertura.xml
+          token: ${{ secrets.CODECOV_TOKEN }}
           fail_ci_if_error: false
-        env:
-          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
 
   security:
     name: Security Audit

README.md

@@ -1,7 +1,7 @@
 # neuron
 
-[![CI](https://github.com/secbear/neuron/actions/workflows/ci.yml/badge.svg)](https://github.com/secbear/neuron/actions/workflows/ci.yml)
-[![codecov](https://codecov.io/gh/secbear/neuron/graph/badge.svg)](https://codecov.io/gh/secbear/neuron)
+[![CI](https://github.com/SecBear/neuron/actions/workflows/ci.yml/badge.svg)](https://github.com/SecBear/neuron/actions/workflows/ci.yml)
+[![codecov](https://codecov.io/gh/SecBear/neuron/graph/badge.svg)](https://codecov.io/gh/SecBear/neuron)
 [![crates.io](https://img.shields.io/crates/v/neuron.svg)](https://crates.io/crates/neuron)
 [![docs.rs](https://docs.rs/neuron/badge.svg)](https://docs.rs/neuron)
 [![MSRV](https://img.shields.io/badge/MSRV-1.90-blue.svg)](https://blog.rust-lang.org/)