Bump debugpy from 1.8.19 to 1.8.20 (#846)

Bumps [debugpy](https://github.com/microsoft/debugpy) from 1.8.19 to 1.8.20.
- [Release notes](https://github.com/microsoft/debugpy/releases)
- [Commits](microsoft/debugpy@v1.8.19...v1.8.20)

---
updated-dependencies:
- dependency-name: debugpy
  dependency-version: 1.8.20
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Raman Gupta <7243222+raman325@users.noreply.github.com>

Author: dependabot[bot]

requirements_dev.txt

@@ -2,7 +2,7 @@
 -r requirements_test.txt
 aiofiles==25.1.0
 colorlog==6.10.1
-debugpy==1.8.19
+debugpy==1.8.20
 homeassistant>=2026.2.0b0
 pyserial==3.5
 pyudev==0.24.4