Update ddtrace requirement from ~=1.17 to ~=1.18 (#745)

* Update ddtrace requirement from ~=1.17 to ~=1.18

Updates the requirements on [ddtrace](https://github.com/DataDog/dd-trace-py) to permit the latest version.
- [Release notes](https://github.com/DataDog/dd-trace-py/releases)
- [Changelog](https://github.com/DataDog/dd-trace-py/blob/1.x/CHANGELOG.md)
- [Commits](DataDog/dd-trace-py@v1.17.0...v1.18.0)

---
updated-dependencies:
- dependency-name: ddtrace
  dependency-type: direct:development
...

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* Add automated changelog yaml from template for bot PR

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.changes/unreleased/Dependencies-20230814-125450.yaml

@@ -0,0 +1,6 @@
+kind: "Dependencies"
+body: "Update ddtrace requirement from ~=1.17 to ~=1.18"
+time: 2023-08-14T12:54:50.00000Z
+custom:
+  Author: dependabot[bot]
+  PR: 745

dev-requirements.txt

@@ -8,7 +8,7 @@ git+https://github.com/dbt-labs/dbt-core.git#egg=dbt-tests-adapter&subdirectory=
 black~=23.7
 bumpversion~=0.6.0
 click~=8.1
-ddtrace~=1.17
+ddtrace~=1.18
 flake8~=6.1
 flaky~=3.7
 freezegun~=1.2