[charm] Update dependency boto3 to ^1.34.29 (#326)

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

Author: renovate[bot]

poetry.lock

@@ -15,7 +15,7 @@ repository = "https://github.com/canonical/postgresql-operator"
 python = "^3.10"
 ops = "^2.9.0"
 cryptography = "^42.0.1"
-boto3 = "^1.34.23"
+boto3 = "^1.34.29"
 pgconnstr = "^1.0.1"
 requests = "^2.31.0"
 tenacity = "^8.2.3"