ci: update OpenSSL Chocolatey package version from 3.6.1 to 3.6.2 (#523)

## Summary

Updates the OpenSSL version installed via Chocolatey on Windows CI
runners from 3.6.1 to 3.6.2.

OpenSSL 3.6.1 has been removed from Chocolatey's community repository,
causing all 9 Windows CI jobs to fail with a 404 when attempting to
download `Win64OpenSSL-3_6_1.exe`. The latest available version is
3.6.2.

## Review & Testing Checklist for Human

- [x] Verify that all Windows CI jobs pass with the updated version
- [x] Confirm 3.6.2 is the desired target version (vs pinning to a
different release)

### Notes

This unblocks PR #520 and any other PRs currently blocked by Windows CI
failures.

Link to Devin session:
https://app.devin.ai/sessions/d009d787eaa84d67813ec46d4cd3c382
Requested by: @kinyoklion

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Low Risk**
> Low risk: CI-only change that updates a pinned dependency version on
Windows runners; potential impact is limited to Windows build/test
behavior if 3.6.2 differs from 3.6.1.
> 
> **Overview**
> Updates the Windows CI OpenSSL install step in
`.github/actions/install-openssl/action.yml` to pin Chocolatey OpenSSL
from `3.6.1` to `3.6.2`, unblocking Windows jobs that fail due to the
removed `3.6.1` package.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
ab815f5. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

Author: kinyoklion

.github/actions/install-openssl/action.yml

@@ -32,7 +32,7 @@ runs:
       if: runner.os == 'Windows'
       shell: bash
       run: |
-        choco install openssl --version 3.6.1 -y --no-progress
+        choco install openssl --version 3.6.2 -y --no-progress
         if [ -d "C:\Program Files\OpenSSL-Win64" ]; then
           echo "OPENSSL_ROOT_DIR=C:\Program Files\OpenSSL-Win64" >> $GITHUB_OUTPUT
         else