Bump pandas from 1.1.0 to 1.1.1 (#1772)

Bumps [pandas](https://github.com/pandas-dev/pandas) from 1.1.0 to 1.1.1.
- [Release notes](https://github.com/pandas-dev/pandas/releases)
- [Changelog](https://github.com/pandas-dev/pandas/blob/master/RELEASE.md)
- [Commits](https://github.com/pandas-dev/pandas/compare/v1.1.0...v1.1.1)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -11,7 +11,7 @@ mozci==1.6.7
 numpy==1.19.1
 orjson==3.3.1
 ortools==7.8.7959
-pandas==1.1.0
+pandas==1.1.1
 psutil==5.7.2
 pydriller==1.12
 pyOpenSSL>=0.14  # Could not find a version that satisfies the requirement pyOpenSSL>=0.14; extra == "security" (from requests[security]>=2.7.0->libmozdata==0.1.43)