[deps] Update boto3 requirement from ~=1.35.55 to ~=1.35.71 in /images

Updates the requirements on [boto3](https://github.com/boto/boto3) to permit the latest version.
- [Release notes](https://github.com/boto/boto3/releases)
- [Commits](boto/boto3@1.35.55...1.35.71)

---
updated-dependencies:
- dependency-name: boto3
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

images/openwisp_base/requirements.txt

@@ -12,4 +12,4 @@ tldextract~=5.1.3
 # these add support for object storage
 # (eg: Amazon S3, GCS)
 django-storages~=1.14.4
-boto3~=1.35.55
+boto3~=1.35.71