chore(deps): bump the pip group across 1 directory with 2 updates

Bumps the pip group with 2 updates in the /backend/python/coqui directory: [transformers](https://github.com/huggingface/transformers) and torch.


Updates `transformers` from 4.48.3 to 5.0.0rc3
- [Release notes](https://github.com/huggingface/transformers/releases)
- [Commits](https://github.com/huggingface/transformers/compare/v4.48.3...v5.0.0rc3)

Updates `torch` from 2.4.1 to 2.7.1+cpu

---
updated-dependencies:
- dependency-name: transformers
  dependency-version: 5.0.0rc3
  dependency-type: direct:production
  dependency-group: pip
- dependency-name: torch
  dependency-version: 2.7.1+cpu
  dependency-type: direct:production
  dependency-group: pip
...

Signed-off-by: dependabot[bot] <support@github.com>

backend/python/coqui/requirements-cpu.txt

@@ -1,6 +1,6 @@
 --extra-index-url https://download.pytorch.org/whl/cpu
-transformers==4.48.3
+transformers==5.0.0rc3
 accelerate
-torch==2.4.1
+torch==2.7.1+cpu
 torchaudio==2.4.1
 coqui-tts

backend/python/coqui/requirements-cublas12.txt

@@ -1,5 +1,5 @@
-torch==2.4.1
+torch==2.7.1+cpu
 torchaudio==2.4.1
-transformers==4.48.3
+transformers==5.0.0rc3
 accelerate
 coqui-tts

backend/python/coqui/requirements-hipblas.txt

@@ -1,6 +1,6 @@
 --extra-index-url https://download.pytorch.org/whl/rocm7.0
-torch==2.10.0+rocm7.0
+torch==2.7.1+cpu
 torchaudio==2.10.0+rocm7.0
-transformers==4.48.3
+transformers==5.0.0rc3
 accelerate
 coqui-tts

backend/python/coqui/requirements-intel.txt

@@ -1,8 +1,8 @@
 --extra-index-url https://download.pytorch.org/whl/xpu
-torch==2.8.0+xpu
+torch==2.7.1+cpu
 torchaudio==2.8.0+xpu
 optimum[openvino]
 setuptools
-transformers==4.48.3
+transformers==5.0.0rc3
 accelerate
 coqui-tts

backend/python/coqui/requirements-mps.txt

@@ -1,4 +1,4 @@
-torch==2.7.1
-transformers==4.48.3
+torch==2.7.1+cpu
+transformers==5.0.0rc3
 accelerate
 coqui-tts