[client] Update dependency prometheus-client to ~=0.19.0 (OpenCTI-Platform#496)

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

Author: renovate[bot]

requirements.txt

@@ -9,4 +9,4 @@ setuptools~=69.0.2
 filigran-sseclient~=1.0.0
 stix2~=3.0.1
 cachetools~=5.3.0
-prometheus-client~=0.18.0
+prometheus-client~=0.19.0

setup.cfg

@@ -35,7 +35,7 @@ install_requires =
     datefinder~=0.7.3
     pika~=1.3.1
     python-magic~=0.4.27; sys_platform == "linux" or sys_platform == "darwin"
-    prometheus-client~=0.18.0
+    prometheus-client~=0.19.0
     python-magic-bin~=0.4.14; sys_platform == "win32"
     python_json_logger~=2.0.4
     pyyaml~=6.0