Add release-notes for message escaping

Add release-notes for message escaping

Some of this messages where used with raw html on wmf wikis, that makes
it possible that this message also will be used with raw html on third
party wikis, therefore give a hint in the release notes.

This includes release notes for:
Id55295a0406659242bbc12a59af7e23fb742237c: editsection
Ic4fcb40de844ac51c88fb51d752a4c286313ecf9: redirectto
I1e90962c3c94c8b72aadfc4c0d041d52e2cde3f1: version-poweredby-others
I7a5dfc8ecd2f84da0dce3e1357af462a3c0da23f: thisisdeleted, viewdeleted
Ifb58bd3823aa633135a701ae3e2ae9c955b422c0: protect-summary-cascade
Id16d8c8dff73fdacad6c9a4ff7f2919945b7e893: editlink, viewsourcelink
Ibcc1b49946bc91e12756eb3866448159493c61f4: lastmodifiedat,
laggedslavemode
Ifd696ecd93c76e56cb21b3f2645367beeeeb5ba0: retrievedfrom

Bug: T85864
Change-Id: I1b144242ccb8780120f1a8ad9e3b6fde0da760f5