[Dependabot]: Update ruamel-yaml requirement from ~=0.18.6 to ~=0.18.7

Updates the requirements on ruamel-yaml to permit the latest version.

---
updated-dependencies:
- dependency-name: ruamel-yaml
  dependency-type: direct:production
...

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

requirements.txt

@@ -1,3 +1,3 @@
 pyTooling >= 6.7, <9.0
-ruamel.yaml ~= 0.18.6
+ruamel.yaml ~= 0.18.7
 lxml ~= 5.3