Update coverage workflow and .gitignore

Switched tarpaulin Docker image to use the latest tag and removed the nightly toolchain requirement in the coverage workflow. Added build_rs_cov.profraw to .gitignore to exclude coverage artifacts.

Author: Tuntii

.github/workflows/coverage.yml

@@ -15,13 +15,13 @@ jobs:
     name: Code Coverage
     runs-on: ubuntu-latest
     container:
-      image: xd009642/tarpaulin:0.27.3
+      image: xd009642/tarpaulin:latest
       options: --security-opt seccomp=unconfined
     steps:
       - uses: actions/checkout@v4
       - name: Generate code coverage
         run: |
-          cargo +nightly tarpaulin --verbose --all-features --workspace --timeout 120 --out Xml
+          cargo tarpaulin --verbose --all-features --workspace --timeout 120 --out Xml
       - name: Upload to Codecov
         uses: codecov/codecov-action@v3
         with:

.gitignore

@@ -11,3 +11,4 @@ assets/cb7d0daf60d7675081996d81393e2ae5.jpg
 assets/b9c93c1cd427d8f50e68dbd11ed2b000.jpg
 
 docs/cookbook/book/
+build_rs_cov.profraw