wm/shod: update to 2.6.2

v2.6.2
- No changelog provided

v2.6.1
- No changelog provided

v2.6.0
- Added automatic tabbing of related windows.
- Added automatic reloading of resources.
- Added exit command in shodc(1).
- Added (experimental) support for GNUstep windows.
- Deprecate -m (set modifier) in favor of the newer -A (use Alt) and -W
  (use Super/Winkey).
- Several bugfixes.

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