Bump musicalninjadad/rust-devcontainer from 6011d5d to 805d40f in /.devcontainer (#198)

Bumps
[musicalninjadad/rust-devcontainer](https://github.com/MusicalNinjaDad/rust)
from `6011d5d` to `805d40f`.
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.devcontainer/Dockerfile

@@ -1 +1 @@
-FROM ghcr.io/musicalninjadad/rust-devcontainer@sha256:6011d5d92c670e171554732eb90957e6ebf5d2ff7c25afab4e0194758ffdda61
+FROM ghcr.io/musicalninjadad/rust-devcontainer@sha256:805d40f900195aae9aecdb9abdb7fbaece644c7750bba8c86f625b629fcc339e