docs: fix typos in documentation and release notes

[Avicennasis]

Summary

Fix 28 verified typos and grammar errors in documentation, all in first-party Extreme Networks files:

• XMC_XIQ-SE/oneview_workflows/xwf/Sync_PVI_to_Policy_Mappings_relnotes.md (24): robutiness -> robustness, cause -> caused, don't -> doesn't, scal -> scale, sinlge -> single, allowes -> allows, parralel -> parallel, determinat -> determines, By default is -> By default it is, a unpredicted -> an unpredicted, multible -> multiple, copy past -> copy-paste, LOG form -> LOG from (x2), fornt -> front, malform -> malforms, some time -> sometimes, privat -> private, platforn -> platform, funtion -> function, because is set -> because it is set, indented config -> intended config (x2), bindis -> bindings, Supress -> Suppress
• Switch_Engine/Python/README.md (2): Port Statistics Ssummary -> Port Statistics Summary, can converts -> can convert
• Switch_Engine/Python/snmpassist/README.md (2): portion of the scripts asks -> portion of the script asks, later, The switch -> later, the switch

Documentation only - no scripts or code were modified.

Notes on what was deliberately left alone:

• Switch_Engine/Python/README.md is parsed by git_download/git_download.py, so only the display label and description text were touched. No link targets changed, and no leading space was added or removed from any Description cell (that space is the flag that omits a script from git_download).
• The LOG formatting issue in 'update_Policy_Mappings' entry in the release notes was left as-is; only Debug LOG form user input dialog was corrected to from.
• Nothing under XMC_XIQ-SE/nbi_clients/VlanLister.go/ was touched. That directory is a copy of an upstream project (https://gitlab.com/rbrt-weiler/xmc-nbi-vlanlister-go) with its own LICENSE, and its README says the upstream copy may be newer, so typos there belong upstream.
• Switch_Engine/Python/fa-ztc/README.md still reads Ok to proceed (y/n) ? because that is verbatim output from fa-ztc.py (raw_input("Ok to proceed (y/n) ?")), and the transcript should keep matching the script.