Bump version of github actions (#1937)

Bump version of github actions

- actions/setup-go: Bumping it to v5.
With the v5, cache is done by default, so there is no need to
specify cache: true

- actions/checkout: bumping it to v4
A lot of different improvements, but the one that made me decide
to upgrade was to use node20 instead of node16.
Node16 has en end of life on 11 Sep 2023

- codecov/codecov-action: bumping it to v4 (v4.5.0)
It was hard-coded v4.2.0, meaning that the fixes around detecting
if running from a fork (v4.3, v4.4 and v.4.5) were not backported,
therefore making the job not being able to detect when it was
running from a fork

.github/workflows/juno-test.yml

@@ -19,12 +19,11 @@ jobs:
     env:
       VM_DEBUG: true
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up go
-        uses: actions/setup-go@v4.1.0
+        uses: actions/setup-go@v5
         with:
           go-version-file: go.mod
-          cache: true
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2
         with:
@@ -50,10 +49,10 @@ jobs:
       - name: Benchmark
         run: make benchmarks
 
-      - uses: actions/upload-artifact@v4
+      - name: Upload coverage to Codecov
         if: matrix.os == 'ubuntu-latest'
+        uses: codecov/codecov-action@v4
         with:
-          name: code_coverage
-          path: ./coverage/coverage.out
-          if-no-files-found: error
-          retention-days: 1
+          token: ${{ secrets.CODECOV_TOKEN }}
+          fail_ci_if_error: true
+          files: coverage.out