Add notes on text-autospace initial-value mismatch (#29646)

Agent-Logs-Url: https://github.com/tats-u/browser-compat-data/sessions/2e6e0f19-da52-49ba-be0e-4355deca2c50
Agent-Logs-Url: https://github.com/tats-u/browser-compat-data/sessions/67de7613-fb42-4b68-8eb6-a88d58032bbb

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Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com>

Author: tats-u

css/properties/text-autospace.json

@@ -10,20 +10,23 @@
           ],
           "support": {
             "chrome": {
-              "version_added": "140"
+              "version_added": "140",
+              "notes": "The initial value is `no-autospace` instead of `normal` (see [csswg-drafts issue #12386](https://github.com/w3c/csswg-drafts/issues/12386))."
             },
             "chrome_android": "mirror",
             "edge": "mirror",
             "firefox": {
               "version_added": "145",
-              "impl_url": "https://bugzil.la/1869577"
+              "impl_url": "https://bugzil.la/1869577",
+              "notes": "The initial value is `no-autospace` instead of `normal` (see [csswg-drafts issue #12386](https://github.com/w3c/csswg-drafts/issues/12386))."
             },
             "firefox_android": "mirror",
             "oculus": "mirror",
             "opera": "mirror",
             "opera_android": "mirror",
             "safari": {
-              "version_added": "18.4"
+              "version_added": "18.4",
+              "notes": "The initial value is `no-autospace` instead of `normal` (see [csswg-drafts issue #12386](https://github.com/w3c/csswg-drafts/issues/12386))."
             },
             "safari_ios": "mirror",
             "samsunginternet_android": "mirror",