[Dependabot]: Update pytooling requirement from ~=8.7 to ~=8.8

Updates the requirements on [pytooling](https://GitHub.com/pyTooling/pyTooling) to permit the latest version.
- [Commits](https://GitHub.com/pyTooling/pyTooling/compare/v8.7.0...v8.8.0)

---
updated-dependencies:
- dependency-name: pytooling
  dependency-version: 8.8.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,4 +1,4 @@
-pyTooling ~= 8.7
+pyTooling ~= 8.8
 pyVHDLModel ~= 0.31
 pySVModel ~= 0.5
 pySystemRDLModel ~= 0.3