Update dependency langchain to v0.3.28

Signed-off-by: red-hat-konflux <126015336+red-hat-konflux[bot]@users.noreply.github.com>

Author: red-hat-konflux[bot]

requirements.txt

@@ -305,9 +305,9 @@ jsonpointer==3.0.0 \
 kubernetes==30.1.0 \
     --hash=sha256:41e4c77af9f28e7a6c314e3bd06a8c6229ddd787cad684e0ab9f69b498e98ebc \
     --hash=sha256:e212e8b7579031dd2e512168b617373bc1e03888d41ac4e04039240a292d478d
-langchain==0.3.27 \
-    --hash=sha256:7b20c4f338826acb148d885b20a73a16e410ede9ee4f19bb02011852d5f98798 \
-    --hash=sha256:aa6f1e6274ff055d0fd36254176770f356ed0a8994297d1df47df341953cec62
+langchain==0.3.28 \
+    --hash=sha256:1ba1244477b67b812b775f346209fa596e78bf055a34e45ce22acb7a45842a32 \
+    --hash=sha256:30a32f44cc6690bcc6a6fb7c14d61a15406d5eda1a0e7eab60b3660944888741
 langchain-community==0.3.27 \
     --hash=sha256:581f97b795f9633da738ea95da9cb78f8879b538090c9b7a68c0aed49c828f0d \
     --hash=sha256:e1037c3b9da0c6d10bf06e838b034eb741e016515c79ef8f3f16e53ead33d882