Bump python from 3.10.5-slim to 3.10.6-slim in /infra (#3027)

Bumps python from 3.10.5-slim to 3.10.6-slim.

---
updated-dependencies:
- dependency-name: python
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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infra/dockerfile.base

@@ -1,4 +1,4 @@
-FROM python:3.10.5-slim
+FROM python:3.10.6-slim
 
 # Setup dependencies in a cacheable step
 COPY requirements.txt /requirements.txt

infra/dockerfile.spawn_pipeline

@@ -1,4 +1,4 @@
-FROM python:3.10.5-slim
+FROM python:3.10.6-slim
 
 # Setup dependencies in a cacheable step
 ADD spawn_pipeline_requirements.txt /code/