Pull request 2147: all: upd deps, go, scripts

Squashed commit of the following:

commit 425f1bd28074d22890629d06f43257e0353ce3d5
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Thu Feb 8 20:15:58 2024 +0300

    all: upd deps, go, scripts

CHANGELOG.md

@@ -23,12 +23,46 @@ See also the [v0.107.45 GitHub milestone][ms-v0.107.45].
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-### Added 
+### Security
 
-- Context menu item in the Query Log to add a Client to the Persistent client list ([#6679]).
+- Go version has been updated to prevent the possibility of exploiting the Go
+  vulnerabilities fixed in Go 1.21.6 and Go 1.21.7.
+
+### Added
+
+- Context menu item in the Query Log to add a Client to the Persistent client
+  list ([#6679]).
+
+### Changed
+
+- Starting with this release our scripts are using Go's [forward compatibility
+  mechanism][go-toolchain] for updating the Go version.
+
+  **Important note for porters:**  This change means that if your `go` version
+  is 1.21+ but is different from the one required by AdGuard Home, the `go` tool
+  will automatically download the required version.
+
+  If you want to use the version installed on your builder, run:
+
+  ```sh
+  go get go@$YOUR_VERSION
+  go mod tidy
+  ```
+
+  and call `make` with `GOTOOLCHAIN=local`.
+
+### Deprecated
+
+- Go 1.21 support.  Future versions will require at least Go 1.22 to build.
+
+### Removed
+
+- Go 1.20 support, as it has reached end of life.
 
 [#6679]: https://github.com/AdguardTeam/AdGuardHome/issues/6679
 
+[go-toolchain]: https://go.dev/blog/toolchain
+
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