Bump ghc-boot-th

Author: tomjaguarpaw

extensions.cabal

@@ -97,7 +97,7 @@ library
                      , containers ^>= 0.6
                      , directory ^>= 1.3
                      , filepath ^>= 1.4
-                     , ghc-boot-th >= 8.8.1 && < 9.9
+                     , ghc-boot-th >= 8.8.1 && < 9.11
                      , parsec ^>= 3.1
                      , text >= 1.2.3 && < 2.2