Update documentation with zap supporting amd64 (#28210)

* ZAP supports arm64, doc this

* Fix file name

docs/code_generation.md

@@ -40,10 +40,6 @@ ZAP is generally installed as a third-party tool via CIPD during the build
 environment bootstrap (see `scripts/setup/zap.json`), which makes `zap-cli`
 available in `$PATH` when running in a build environment.
 
-**NOTE**: zap packages are currently NOT available for `arm64` (like when
-compiling on Raspberry PI.). In these cases one should check out zap from source
-and set `$ZAP_DEVELOPMENT_PATH` as described below.
-
 When matter scripts need to invoke `zap-cli` (for code generation) or `zap` (to
 start the UI tool), they make use of the following environment variables to
 figure out where the zap tool is located (in order of precedence):

docs/guides/BUILDING.md

@@ -169,8 +169,8 @@ The ZAP tool scripting uses the following detection, in order of importance:
     -   Use this if you are developing ZAP locally and would like to run ZAP
         with your changes.
 
--   `$ZAP_INSTALL_PATH` to point to where `zap-linux.zip` or `zap-mac.zip` was
-    unpacked.
+-   `$ZAP_INSTALL_PATH` to point to where `zap-linux-x64.zip`,
+    `zap-linux-arm64.zip` or `zap-mac-x64.zip` was unpacked.
 
     -   This allows you to not need to place `zap` or `zap-cli` (or both) in
         `$PATH`.