[l10n] Fix 'generated/Deprecation.ts'

The CL https://crrev.com/c/6287325 broke the extraction of the
generated deprecation UI messages.

This CL fixes it by appending the now necessary `as const` suffix.

[email protected]

Bug: None
Change-Id: I63803bcc9b40adba0d15559d5dc3400ef8374621
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6297980
Auto-Submit: Simon Zünd <[email protected]>
Reviewed-by: Kim-Anh Tran <[email protected]>
Commit-Queue: Kim-Anh Tran <[email protected]>
Commit-Queue: Simon Zünd <[email protected]>

Author: szuend

front_end/generated/Deprecation.ts

@@ -234,7 +234,7 @@ export const UIStrings = {
    * @description Warning displayed to developers that instead of using `supportsSession()`, which returns a promise that resolves if the XR session can be supported and rejects if not, they should use `isSessionSupported()` which will return a promise which resolves to a boolean indicating if the XR session can be supported or not, but may reject to throw an exception.
    */
   XRSupportsSession: "`supportsSession()` is deprecated. Please use `isSessionSupported()` and check the resolved boolean value instead.",
-};
+} as const;
 
 export interface DeprecationDescriptor {
   milestone?: number;

scripts/build/generate_deprecations.py

@@ -87,7 +87,7 @@ def deprecations_from_file(file_name):
         f.write("   * @description %s\n" % note)
         f.write("   */\n")
         f.write("  %s: %s,\n" % (name, json.dumps(message)))
-    f.write("};\n")
+    f.write("} as const;\n")
     f.write("\n")
     f.write("export interface DeprecationDescriptor {\n")
     f.write("  milestone?: number;\n")