Update dependency pip to v25.3

Author: renovate[bot]

requirements.txt

@@ -1,6 +1,6 @@
 poetry==2.2.1
 poetry-dynamic-versioning==1.9.1
-pip==25.2
+pip==25.3
 poetry-plugin-export==1.9.0
 certifi>=2024.7.4 # not directly required, pinned by Snyk to avoid a vulnerability
 zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability