docs: use the version file from the main branch

As we are using the static file for showing versions in the drop-down
this would be outdated with each new release, so use it from the main
branch, with the assumption that it would always be up-to-date.

docs/_static/esp_sdk_matter_version.js

@@ -1,16 +0,0 @@
-var DOCUMENTATION_VERSIONS = {
-  DEFAULTS: { has_targets: false,
-              supported_targets: [ "esp32" ]
-            },
-  VERSIONS: [
-    { name: "latest", has_targets: true, supported_targets: [ "esp32", "esp32c2", "esp32c3", "esp32c6", "esp32s3", "esp32h2" ] },
-  ],
-  IDF_TARGETS: [
-     { text: "ESP32", value: "esp32" },
-     { text: "ESP32-S3", value: "esp32s3" },
-     { text: "ESP32-C2", value: "esp32c2" },
-     { text: "ESP32-C3", value: "esp32c3" },
-     { text: "ESP32-C6", value: "esp32c6" },
-     { text: "ESP32-H2", value: "esp32h2" },
-  ]
-};

docs/conf_common.py

@@ -23,7 +23,7 @@ project_slug = 'esp-matter'
 
 # Contains info used for constructing target and version selector
 # Can also be hosted externally, see esp-idf for example
-versions_url = '_static/esp_sdk_matter_version.js'
+versions_url = 'https://docs.espressif.com/projects/esp-matter/en/latest/esp32/_static/esp_sdk_matter_version.js'
 
 # Final PDF filename will contains target and version
 pdf_file_prefix = u'esp-docs'