Bump tensorflow-gpu in /templates/tensorflow-gpu-1.12

Bumps [tensorflow-gpu](https://github.com/tensorflow/tensorflow) from 1.12.0 to 2.7.2.
- [Release notes](https://github.com/tensorflow/tensorflow/releases)
- [Changelog](https://github.com/tensorflow/tensorflow/blob/master/RELEASE.md)
- [Commits](tensorflow/tensorflow@v1.12.0...v2.7.2)

---
updated-dependencies:
- dependency-name: tensorflow-gpu
  dependency-type: direct:production
...

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

Author: dependabot[bot]

templates/tensorflow-gpu-1.12/requirements.txt

@@ -1,3 +1,3 @@
 algorithmia>=1.0.0,<2.0
 six
-tensorflow-gpu==1.12.0 # if you need a different version, please change this value - bear in mind that it may take longer to compile.
+tensorflow-gpu==2.7.2 # if you need a different version, please change this value - bear in mind that it may take longer to compile.