Make fileLockTimeRemainingMinutes a static method

Signed-off-by: Claudio Cambra <claudio.cambra@nextcloud.com>

src/gui/editlocallyjob.h

@@ -87,7 +87,7 @@ private:
     [[nodiscard]] const QString getRelativePathToRemoteRootForFile() const; // returns either '/' or a (relative path - Folder::remotePath()) for folders pointing to a non-root remote path e.g. '/subfolder' instead of '/'
     [[nodiscard]] const QString getRelativePathParent() const;
 
-    [[nodiscard]] int fileLockTimeRemainingMinutes(const int lockTime, const int lockTimeOut);
+    [[nodiscard]] static int fileLockTimeRemainingMinutes(const int lockTime, const int lockTimeOut);
 
     bool _tokenVerified = false;