Bump cryptography from 3.1.1 to 3.2 in /scripts (#3481)

Bumps [cryptography](https://github.com/pyca/cryptography) from 3.1.1 to 3.2.
- [Release notes](https://github.com/pyca/cryptography/releases)
- [Changelog](https://github.com/pyca/cryptography/blob/master/CHANGELOG.rst)
- [Commits](pyca/cryptography@3.1.1...3.2)

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

scripts/requirements.txt

@@ -8,7 +8,7 @@ certifi==2020.6.20        # via requests
 cffi==1.14.3              # via cryptography
 chardet==3.0.4            # via requests
 click==7.1.2              # via -r requirements.in, pip-tools
-cryptography==3.1.1       # via -r requirements.in
+cryptography==3.2         # via -r requirements.in
 future==0.18.2            # via -r requirements.in, mobly
 idna==2.10                # via requests
 mobly==1.10               # via -r requirements.in