fix(ci): ensure version markers are replaced across all files (#10752)

Upon moving the version string from PKG_VERSION and Cargo.toml, we lost
the bump version automation. To avoid more bugs here in the future, we
now check for the version marker across all Git-tracked files,
regardless of their extension.

Fixes #10748

---------

Co-authored-by: Thomas Eizinger <thomas@eizinger.io>

website/src/components/Changelog/Android.tsx

@@ -20,7 +20,11 @@ export default function Android() {
   return (
     <Entries downloadLinks={downloadLinks} title="Android">
       {/* When you cut a release, remove any solved issues from the "known issues" lists over in `client-apps`. This must not be done when the issue's PR merges. */}
-      <Unreleased></Unreleased>
+      <Unreleased>
+        <ChangeItem pull="10752">
+          Fixes an issue where the reported client version was out of date.
+        </ChangeItem>
+      </Unreleased>
       <Entry version="1.5.6" date={new Date("2025-10-28")}>
         <ChangeItem pull="10667">
           Fixes an issue where the Tunnel service would crash when trying to

website/src/components/Changelog/Apple.tsx

@@ -24,7 +24,11 @@ export default function Apple() {
   return (
     <Entries downloadLinks={downloadLinks} title="macOS / iOS">
       {/* When you cut a release, remove any solved issues from the "known issues" lists over in `client-apps`. This must not be done when the issue's PR merges. */}
-      <Unreleased></Unreleased>
+      <Unreleased>
+        <ChangeItem pull="10752">
+          Fixes an issue where the reported client version was out of date.
+        </ChangeItem>
+      </Unreleased>
       <Entry version="1.5.9" date={new Date("2025-10-20")}>
         <ChangeItem pull="10603">
           Fixes an issue on macOS where DNS resources might fail to be routed