[BUMP] Update dependency privatebin/privatebin to v1.7.7 (bin)

[renovate]

This PR contains the following updates:

Package	Update	Change
privatebin/privatebin	patch	1.7.6 -> 1.7.7

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Release Notes

privatebin/privatebin (privatebin/privatebin)

v1.7.7

Compare Source

• ADDED: Switching templates using the web ui (#​1501)
• ADDED: Show file name and size on download page (#​603)
• CHANGED: Passing large data structures by reference to reduce memory consumption (#​858)
• CHANGED: Removed use of ctype functions and polyfill library for ctype
• CHANGED: Upgrading libraries to: DOMpurify 3.2.6, ip-lib 1.20.0
• CHANGED: Support for multiple file uploads (#​1060)
• CHANGED: Documented CSP change necessary to allow PDF attachment preview (#​1552)
• FIXED: Hide Reply button in the discussions once clicked to avoid losing the text input (#​1508)
• FIXED: Bump zlib library suffix, ensuring cache refresh for WASM streaming change
• FIXED: Handle undefined globals in file based persisted values (#​1544)

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