Fixes #757

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PiperOrigin-RevId: 345596855
Source-Link: googleapis/googleapis@d189e87

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Just a simple documentation fix for the `Database` instances section.

#### Before: 
![image](https://user-images.githubusercontent.com/18705930/107685994-6b33bb00-6c83-11eb-91f8-2940890576f7.png)

#### After: 
![image](https://user-images.githubusercontent.com/18705930/107686049-7c7cc780-6c83-11eb-8fb5-1158dcc75715.png)

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Fixes #793. 🦕

* chore: synth

* chore: run npx compileProtos src

* chore: npm run fix

Fixes #799

chore: add SECURITY.md

Co-authored-by: Benjamin E. Coe <[email protected]>

🤖 I have created a release \*beep\* \*boop\*
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## [6.4.0](https://www.github.com/googleapis/nodejs-datastore/compare/v6.3.1...v6.4.0) (2021-04-29)


### Features

* Add createIndex, deleteIndex protos ([#797](https://www.github.com/googleapis/nodejs-datastore/issues/797)) ([3ff1f51](https://www.github.com/googleapis/nodejs-datastore/commit/3ff1f51f19297db94a370ec3fc9130f36e25ea70))


### Bug Fixes

* **deps:** update dependency sinon to v10 ([#810](https://www.github.com/googleapis/nodejs-datastore/issues/810)) ([267992f](https://www.github.com/googleapis/nodejs-datastore/commit/267992f4f1523fc5038715b009ebc697c5ca8255))
---


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