Bumps github/codeql-action from 2.20.1 to 2.21.2.

Sourced from github/codeql-action's changelog.

CodeQL Action Changelog

See the releases page for the relevant changes to the CodeQL CLI and language packs.

[UNRELEASED]

• We are rolling out a feature in August 2023 that will improve multi-threaded performance on larger runners. #1817

2.21.2 - 28 Jul 2023

• Update default CodeQL bundle version to 2.14.1. #1797
• Avoid duplicating the analysis summary within the logs. #1811

2.21.1 - 26 Jul 2023

• Improve the handling of fatal errors from the CodeQL CLI. #1795
• Add the sarif-output output to the analyze action that contains the path to the directory of the generated SARIF. #1799

2.21.0 - 19 Jul 2023

• CodeQL Action now requires CodeQL CLI 2.9.4 or later. For more information, see the corresponding changelog entry for CodeQL Action version 2.20.4. #1724

2.20.4 - 14 Jul 2023

• This is the last release of the Action that supports CodeQL CLI versions 2.8.5 to 2.9.3. These versions of the CodeQL CLI were deprecated on June 20, 2023 alongside GitHub Enterprise Server 3.5 and will not be supported by the next release of the CodeQL Action (2.21.0).
  • If you are using one of these versions, please update to CodeQL CLI version 2.9.4 or later. For instance, if you have specified a custom version of the CLI using the 'tools' input to the 'init' Action, you can remove this input to use the default version.
  • Alternatively, if you want to continue using a version of the CodeQL CLI between 2.8.5 and 2.9.3, you can replace 'github/codeql-action/@​v2' by 'github/codeql-action/@​v2.20.4' in your code scanning workflow to ensure you continue using this version of the CodeQL Action.
• We are rolling out a feature in July 2023 that will slightly reduce the default amount of RAM used for query execution, in proportion to the runner's total memory. This will help to avoid out-of-memory failures on larger runners. #1760
• Update default CodeQL bundle version to 2.14.0. #1762

2.20.3 - 06 Jul 2023

• Update default CodeQL bundle version to 2.13.5. #1743

2.20.2 - 03 Jul 2023

No user facing changes.

2.20.1 - 21 Jun 2023

• Update default CodeQL bundle version to 2.13.4. #1721
• Experimental: add a new resolve-environment action which attempts to infer a configuration for the build environment that is required to build a given project. Do not use this in production as it is part of an internal experiment and subject to change at any time.

2.20.0 - 13 Jun 2023

• Bump the version of the Action to 2.20.0. This ensures that users who received a Dependabot upgrade to cdcdbb5, which was mistakenly marked as Action version 2.13.4, continue to receive updates to the CodeQL Action. Full details in #1729

2.3.6 - 01 Jun 2023

• Update default CodeQL bundle version to 2.13.3. #1698

... (truncated)

• 0ba4244 Merge pull request #1813 from github/update-v2.21.2-10c6bfee1
• a9a416c Update changelog for v2.21.2
• 10c6bfe Merge pull request #1811 from github/henrymercer/print-summary-once
• feea86e Merge pull request #1810 from github/henrymercer/ci/use-platform-specific-bun...
• 2e6f8c0 Add changelog note
• 8342844 Only print the analysis summary once
• 679aac1 Use platform specific bundles in PR checks
• de6681c Merge pull request #1797 from github/update-bundle/codeql-bundle-v2.14.1
• f6fe5c5 Merge branch 'main' into update-bundle/codeql-bundle-v2.14.1
• 6276217 Merge pull request #1808 from github/mergeback/v2.21.1-to-main-6ca1aa8c
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