Merge bitcoin/bitcoin#21733: build: Re-add command to install vcpkg

de17d245b7 Re-add command to install vcpkg (dplusplus1024)

Pull request description:

  `vcpkg integrate install` must be executed so that msbuild will automatically install external dependencies.

  It was removed in 712f95d332

  It was originally added in 7644567758

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ACKs for top commit:
  sipsorcery:
    ACK de17d245b7.
  hebasto:
    ACK de17d245b7, I use the same in #21551.

Tree-SHA512: b32428e450cf76297a0e78b5ffb0933ddcfcce010dbd6f5b87d434bf9c437258edb5b817161f6255d5d60523f79f8513a1fe3e92ba62e3fd3786ab042aaae849

build_msvc/README.md

@@ -27,7 +27,11 @@ Options for installing the dependencies in a Visual Studio compatible manner are
 - Download the source code, build each dependency, add the required include paths, link libraries and binary tools to the Visual Studio project files.
 - Use [nuget](https://www.nuget.org/) packages with the understanding that any binary files have been compiled by an untrusted third party.
 
-The [external dependencies](https://github.com/bitcoin/bitcoin/blob/master/doc/dependencies.md) required for building are listed in the `build_msvc/vcpkg.json` file. The `msbuild` project files are configured to automatically install the `vcpkg` dependencies.
+The [external dependencies](https://github.com/bitcoin/bitcoin/blob/master/doc/dependencies.md) required for building are listed in the `build_msvc/vcpkg.json` file. To ensure `msbuild` project files automatically install the `vcpkg` dependencies use:
+
+```
+vcpkg integrate install
+```
 
 Qt
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