build(deps): bump Externals/cryptopp from `78a64e3` to `f80fee7`

Created by: dependabot[bot]

Bumps Externals/cryptopp from 78a64e3 to f80fee7.

Commits

• f80fee7 Update documentation
• 72237f9 Update documentation
• d6322a8 Whitespace check-in
• b41f1f0 Add O_NOFOLLOW when available in OS rngs
• 7cf1b57 Whitespace check-in
• beec095 Post-release version increment
• 959595e Prepare for Crypto++ 8.6 release
• 69bf6b5 Prepare for Crypto++ 8.6 release
• bca628e Update documentation
• bee8e8c Use subgroup order in ElGamal encryption (GH #1059, CVE-2021-40530)
• Additional commits viewable in compare view

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