ci(deps): bump step-security/harden-runner from 2.1.0 to 2.3.0 (#198)

Bumps [step-security/harden-runner](https://github.com/step-security/harden-runner) from 2.1.0 to 2.3.0.
- [Release notes](https://github.com/step-security/harden-runner/releases)
- [Commits](step-security/harden-runner@18bf8ad...03bee39)

---
updated-dependencies:
- dependency-name: step-security/harden-runner
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/main.yml

@@ -56,7 +56,7 @@ jobs:
     # Windows builds may have insufficient resource limits, so they're increased.
     - name: Harden Runner
       if: ${{ matrix.os == 'ubuntu-latest' }}
-      uses: step-security/harden-runner@18bf8ad2ca49c14cbb28b91346d626ccfb00c518
+      uses: step-security/harden-runner@03bee3930647ebbf994244c21ddbc0d4933aab4f
       with:
         disable-sudo: true
         egress-policy: block
@@ -309,7 +309,7 @@ jobs:
       runs-on: ubuntu-latest
       steps:
         - name: Harden Runner
-          uses: step-security/harden-runner@18bf8ad2ca49c14cbb28b91346d626ccfb00c518
+          uses: step-security/harden-runner@03bee3930647ebbf994244c21ddbc0d4933aab4f
           with:
             disable-sudo: true
             egress-policy: block
@@ -338,7 +338,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@18bf8ad2ca49c14cbb28b91346d626ccfb00c518
+        uses: step-security/harden-runner@03bee3930647ebbf994244c21ddbc0d4933aab4f
         with:
           disable-sudo: true
           egress-policy: block