Add missing PublicAPI attributes

Author: cimnine

src/Testcontainers/Builders/IContainerBuilder`2.cs

@@ -329,6 +329,7 @@ public interface IContainerBuilder<out TBuilderEntity, out TContainerEntity> : I
     /// <param name="target">The target directory or file path to copy the file to.</param>
     /// <param name="fileMode">The POSIX file mode permission.</param>
     /// <returns>A configured instance of <typeparamref name="TBuilderEntity" />.</returns>
+    [PublicAPI]
     [Obsolete("Use WithResourceMapping(Uri, FileInfo, UnixFileModes) or WithResourceMapping(Uri, DirectoryInfo, UnixFileModes) instead.")]
     TBuilderEntity WithResourceMapping(Uri source, string target, UnixFileModes fileMode = Unix.FileMode644);
 
@@ -349,6 +350,7 @@ public interface IContainerBuilder<out TBuilderEntity, out TContainerEntity> : I
     /// <param name="target">The target directory path to copy the file to.</param>
     /// <param name="fileMode">The POSIX file mode permission.</param>
     /// <returns>A configured instance of <typeparamref name="TBuilderEntity" />.</returns>
+    [PublicAPI]
     TBuilderEntity WithResourceMapping(Uri source, DirectoryInfo target, UnixFileModes fileMode = Unix.FileMode644);
 
     /// <summary>
@@ -365,6 +367,7 @@ public interface IContainerBuilder<out TBuilderEntity, out TContainerEntity> : I
     /// <param name="target">The target file path to copy the file to.</param>
     /// <param name="fileMode">The POSIX file mode permission.</param>
     /// <returns>A configured instance of <typeparamref name="TBuilderEntity" />.</returns>
+    [PublicAPI]
     TBuilderEntity WithResourceMapping(Uri source, FileInfo target, UnixFileModes fileMode = Unix.FileMode644);
 
     /// <summary>