chore(deps): update ssciwr/doxygen-install action to v2 (#7060)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[ssciwr/doxygen-install](https://redirect.github.com/ssciwr/doxygen-install)
| action | major | `v1` → `v2` |

---

### Release Notes

<details>
<summary>ssciwr/doxygen-install (ssciwr/doxygen-install)</summary>

###
[`v2`](https://redirect.github.com/ssciwr/doxygen-install/compare/v1...v2)

[Compare
Source](https://redirect.github.com/ssciwr/doxygen-install/compare/v1...v2)

</details>

---

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.github/workflows/docs.yml

@@ -39,7 +39,7 @@ jobs:
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - name: Install Doxygen
-        uses: ssciwr/doxygen-install@v1
+        uses: ssciwr/doxygen-install@v2
       - name: Generate Javadoc for Java projects
         run: |
           cd java