Ignore cbindgen version in latest-bindings-in-git check.

Currently the check_binidngs GitHub CI job always fails when there
is a new cbindgen release because the cbindgen version is in the
generated header file. When the new version doesn't change the
generated header except for the version number, we should ignore
the difference.

Author: TheBlueMatt

.github/workflows/build.yml

@@ -168,8 +168,8 @@ jobs:
             # cbindgen's bindings output order can be FS-dependant, so check that the lines are all the same:
             mv lightning-c-bindings/include/lightning.h lightning-c-bindings/include/lightning.h.new
             git checkout lightning-c-bindings/include/lightning.h
-            cat lightning-c-bindings/include/lightning.h | sort > lightning-c-bindings/include/lightning.h.sorted
-            cat lightning-c-bindings/include/lightning.h.new | sort > lightning-c-bindings/include/lightning.h.new.sorted
+            cat lightning-c-bindings/include/lightning.h | grep -v "Generated with cbindgen:[0-9\.]*" | sort > lightning-c-bindings/include/lightning.h.sorted
+            cat lightning-c-bindings/include/lightning.h.new | grep -v "Generated with cbindgen:[0-9\.]*" | sort > lightning-c-bindings/include/lightning.h.new.sorted
             diff lightning-c-bindings/include/lightning.h.sorted lightning-c-bindings/include/lightning.h.new.sorted
             #
             mv lightning-c-bindings/include/lightningpp.hpp lightning-c-bindings/include/lightningpp.hpp.new