Build(deps): Bump yosys-f4pga-plugins from 6689e20 to c8d2d14 (#1781

)

Bumps
[yosys-f4pga-plugins](https://github.com/chipsalliance/yosys-f4pga-plugins)
from `6689e20` to `c8d2d14`.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/chipsalliance/yosys-f4pga-plugins/commit/c8d2d149861e7981745a667b502191daf96aaf69"><code>c8d2d14</code></a>
Merge pull request <a
href="https://redirect.github.com/chipsalliance/yosys-f4pga-plugins/issues/528">#528</a>
from antmicro/wsip/hier_path</li>
<li><a
href="https://github.com/chipsalliance/yosys-f4pga-plugins/commit/1009fa45d59900b9e837a9e852289afc06aef388"><code>1009fa4</code></a>
process hier paths</li>
<li>See full diff in <a
href="https://github.com/chipsalliance/yosys-f4pga-plugins/compare/6689e20e5fdb0b8d6f494acd65b08fd4646edc0e...c8d2d149861e7981745a667b502191daf96aaf69">compare
view</a></li>
</ul>
</details>
<br />


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</details>