You're right - the 9.5 interims are missing their release notes. The 9.4 and 9.6 trains have them but not 9.5.
If you really need them, I'd suggest opening a TAC case and requesting them.
Alternatively, you could perform a Bug Searches for what's fixed in the interim release.
It looks like 9.5(2.10) fixes 3 public-facing bugs:
https://bst.cloudapps.cisco.com/bugsearch/search?kw=*&pf=prdNm&pfVal=279513386&rls=9.5(2.10)&sb=fr&srtBy=recMdf