Update basetoolsbin_ext_dep.yaml (microsoft#327)

# Preface

Please ensure you have read the [contribution
docs](https://github.com/microsoft/mu/blob/master/CONTRIBUTING.md) prior
to submitting the pull request. In particular,
[pull request
guidelines](https://github.com/microsoft/mu/blob/master/CONTRIBUTING.md#pull-request-best-practices).

## Description

This change updated base tool external dependency to `2022.8.2` based on
the latest update for Windows-ARM builds, as part of the effort of
microsoft#305.

For each item, place an "x" in between `[` and `]` if true. Example:
`[x]`.
_(you can also check items in the GitHub UI)_

- [x] Impacts functionality?
- **Functionality** - Does the change ultimately impact how firmware
functions?
- Examples: Add a new library, publish a new PPI, update an algorithm,
...
- [ ] Impacts security?
- **Security** - Does the change have a direct security impact on an
application,
    flow, or firmware?
  - Examples: Crypto algorithm change, buffer overflow fix, parameter
    validation improvement, ...
- [ ] Breaking change?
- **Breaking change** - Will anyone consuming this change experience a
break
    in build or boot behavior?
- Examples: Add a new library class, move a module to a different repo,
call
    a function in a new library class in a pre-existing module, ...
- [ ] Includes tests?
  - **Tests** - Does the change include any explicit test code?
  - Examples: Unit tests, integration tests, robot tests, ...
- [ ] Includes documentation?
- **Documentation** - Does the change contain explicit documentation
additions
    outside direct code modifications (and comments)?
- Examples: Update readme file, add feature readme file, link to
documentation
    on an a separate Web page, ...

## How This Was Tested

This change is manually tested function on Windows ARM builds.

## Integration Instructions

N/A

Signed-off-by: kuqin12 <42554914+kuqin12@users.noreply.github.com>

BaseTools/Bin/basetoolsbin_ext_dep.yaml

@@ -12,7 +12,7 @@
   "type": "nuget",
   "name": "Mu-Basetools",
   "source": "https://pkgs.dev.azure.com/projectmu/mu/_packaging/Basetools-Binary/nuget/v3/index.json",
-  "version": "2022.08.1",
+  "version": "2022.08.2",
   "flags": ["set_shell_var", "set_path", "host_specific"],
   "var_name": "EDK_TOOLS_BIN"
 }