chore(deps): update dependency boto3 to v1.38.8

| datasource | package | from    | to     |
| ---------- | ------- | ------- | ------ |
| pypi       | boto3   | 1.35.99 | 1.38.8 |


Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

containers/sidecar-requirements.in

@@ -1,3 +1,3 @@
 barman[azure,cloud,google,snappy,zstandard,lz4]==3.13.3
 setuptools==80.3.1
-boto3==1.35.99
+boto3==1.38.8