[security] build(deps): bump activesupport from 6.0.3 to 6.0.3.1 in /docs

[dependabot-preview]

Bumps activesupport from 6.0.3 to 6.0.3.1.

Changelog

Sourced from activesupport's changelog.

Rails 6.0.3.1 (May 18, 2020)

• [CVE-2020-8165] Deprecate Marshal.load on raw cache read in RedisCacheStore

• [CVE-2020-8165] Avoid Marshal.load on raw cache value in MemCacheStore

Commits

• 34991a6 Preparing for 6.0.3.1 release
• 2c8fe2a bumping version, updating changelog
• 0ad524a update changelog
• bd39a13 activesupport: Deprecate Marshal.load on raw cache read in RedisCacheStore
• 0a7ce52 activesupport: Avoid Marshal.load on raw cache value in MemCacheStore
• See full diff in compare view

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[dependabot-preview]

We've just been alerted that this update fixes a security vulnerability:

Sourced from The Ruby Advisory Database.

Potentially unintended unmarshalling of user-provided objects in MemCacheStore and RedisCacheStore
There is potentially unexpected behaviour in the MemCacheStore and RedisCacheStore where, when
untrusted user input is written to the cache store using the raw: true parameter, re-reading the result
from the cache can evaluate the user input as a Marshalled object instead of plain text. Vulnerable code looks like:

data = cache.fetch("demo", raw: true) { untrusted_string }

Versions Affected: rails < 5.2.5, rails < 6.0.4
Not affected: Applications not using MemCacheStore or RedisCacheStore. Applications that do not use the raw option when storing untrusted user input.
... (truncated)

Patched versions: ["~> 5.2.4.3", ">= 6.0.3.1"]