[fbsync] Update .gitignore (#8757)

Reviewed By: vmoens

Differential Revision: D68021965

fbshipit-source-id: 2bed6b1520964389be2de9d32a92e4370017a7df

Author: NicolasHug

.gitignore

@@ -16,6 +16,7 @@ docs/source/auto_examples/
 docs/source/gen_modules/
 docs/source/generated/
 docs/source/models/generated/
+docs/source/sg_execution_times.rst
 # pytorch-sphinx-theme gets installed here
 docs/src
 
@@ -42,3 +43,5 @@ xcuserdata/
 # direnv
 .direnv
 .envrc
+
+scripts/release_notes/data.json