Logging: destination path missing when destination equals basedir in DefaultMavenResourcesFiltering

### Affected version

3.x

### Bug description

When `DefaultMavenResourcesFiltering.filterResources()` logs copy operations it uses `Path.relativize` against the project's base directory. If the destination path equals `basedir` (i.e. copy to the basedir directory), `basedir.relativize(destination)` returns an empty string, so the log message ends with "to ".
For example: "Copying 1 resource from sourcedir to ".

Current code:
```java
LOGGER.info("Copying " + includedFiles.size() + " resource" + (includedFiles.size() > 1 ? "s" : "")
+ " from "
+ basedir.relativize(resourceDirectory.toAbsolutePath())
+ " to "
+ basedir.relativize(destination));
```
The log message should show the destination path:
- "." or
- the absolute path or
- "basedir" / "project base directory"

Suggested code change:
```java
LOGGER.info("Copying " + includedFiles.size() + " resource" + (includedFiles.size() > 1 ? "s" : "")
+ " from "
+ basedir.relativize(resourceDirectory.toAbsolutePath())
+ " to "
+ (basedir.equals(destination) ? "." : basedir.relativize(destination)));
```