fix: packages/release-trigger/requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-CRYPTOGRAPHY-7161587

packages/release-trigger/requirements.txt

@@ -90,7 +90,7 @@ click==8.0.4 \
     --hash=sha256:6a7a62563bbfabfda3a38f3023a1db4a35978c0abd76f6c9605ecd6554d6d9b1 \
     --hash=sha256:8458d7b1287c5fb128c90e23381cf99dcde74beaf6c7ff6384ce84d6fe090adb
     # via gcp-releasetool
-cryptography==41.0.6 \
+cryptography==42.0.8 \
     --hash=sha256:068bc551698c234742c40049e46840843f3d98ad7ce265fd2bd4ec0d11306596 \
     --hash=sha256:0f27acb55a4e77b9be8d550d762b0513ef3fc658cd3eb15110ebbcbd626db12c \
     --hash=sha256:2132d5865eea673fe6712c2ed5fb4fa49dba10768bb4cc798345748380ee3660 \