Bump pact_broker-client from 1.75.2 to 1.75.3

Bumps [pact_broker-client](https://github.com/pact-foundation/pact_broker-client) from 1.75.2 to 1.75.3.
- [Release notes](https://github.com/pact-foundation/pact_broker-client/releases)
- [Changelog](https://github.com/pact-foundation/pact_broker-client/blob/master/CHANGELOG.md)
- [Commits](pact-foundation/pact_broker-client@v1.75.2...v1.75.3)

---
updated-dependencies:
- dependency-name: pact_broker-client
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -476,7 +476,8 @@ GEM
       diff-lcs (~> 1.5)
       expgen (~> 0.1)
       rainbow (~> 3.1.1)
-    pact_broker-client (1.75.2)
+    pact_broker-client (1.75.3)
+      base64 (~> 0.2)
       dig_rb (~> 1.0)
       httparty (>= 0.21.0, < 1.0.0)
       rake (~> 13.0)