chore: Bump requests from 2.21.0 to 2.31.0 in /examples/logs-slack-alerts/function_source (#127)

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

examples/logs-slack-alerts/function_source/requirements.txt

@@ -1,2 +1,2 @@
 google-cloud-bigquery==1.14.0
-requests==2.21.0
+requests==2.31.0