docs: Fix typos

Closes: #7370
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>

docs/SSL-PROBLEMS.md

@@ -33,7 +33,7 @@
 
   Browsers work around this problem in two ways: they cache intermediate
   certificates from previous transfers and some implement the TLS "AIA"
-  extension that lets the client explicitly download such cerfificates on
+  extension that lets the client explicitly download such certificates on
   demand.
 
 ## Protocol version

projects/README

@@ -145,7 +145,7 @@ Notes
    find bugs in the project files that need correcting, and would like to
    submit updated files back then please note that, whilst the solution files
    can be edited directly, the templates for the project files (which are
-   stored in the git repositoty) will need to be modified rather than the
+   stored in the git repository) will need to be modified rather than the
    generated project files that Visual Studio uses.
 
 Legacy Windows and SSL