chore: remove extra trailing curly brace from conda build string (#977)

Debugging an unrelated issue I noticed an extra curly brace in the build string for both conda recipes.

Example extra brace:
```
🐚 mamba repoquery search cucim -c rapidsai-nightly
Getting repodata from channels...

rapidsai-nightly/noarch                             87.0kB @ 328.8kB/s  0.1s
conda-forge/noarch                                  23.5MB @  41.1MB/s  0.5s
conda-forge/linux-64                                49.0MB @  57.1MB/s  0.8s
rapidsai-nightly/linux-64                            2.8MB @   2.7MB/s  0.9s
 Name  Version     Build                                                        Channel          Subdir
──────────────────────────────────────────────────────────────────────────────────────────────────────────
 cucim 26.02.00a6  cuda12_py310_251124_ghge6a3044_gn6}_phc494990  (+ 15 builds) rapidsai-nightly linux-64
 cucim 26.02.00a4  cuda12_py310_251121_ghg26afd46_gn4}_phc494990  (+ 31 builds) rapidsai-nightly linux-64
 cucim 26.02.00a3  cuda12_py310_251118_ghgdae090f_gn3}_phc494990  (+ 31 builds) rapidsai-nightly linux-64
 cucim 25.12.00a27 cuda12_py310_251125_ghg2e3bc68_gn27}_phc494990 (+  7 builds) rapidsai-nightly linux-64
 cucim 25.12.00a26 cuda12_py310_251118_ghg3a8dfd7_gn26}_phc494990 (+ 55 builds) rapidsai-nightly linux-64
 cucim 25.10.00a29 cuda13_py310_251012_ghg514fb30_gn29}_phc494990 (+ 11 builds) rapidsai-nightly linux-64
```

Authors:
  - Gil Forsyth (https://github.com/gforsyth)

Approvers:
  - James Lamb (https://github.com/jameslamb)

URL: #977

Author: gforsyth

conda/recipes/cucim/meta.yaml

@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: Copyright (c) 2021-2023, NVIDIA CORPORATION.
+# SPDX-FileCopyrightText: Copyright (c) 2021-2025, NVIDIA CORPORATION.
 # SPDX-License-Identifier: Apache-2.0
 
 {% set version = environ['RAPIDS_PACKAGE_VERSION'].lstrip('v') %}
@@ -17,7 +17,7 @@ source:
 
 build:
   number: {{ GIT_DESCRIBE_NUMBER }}
-  string: cuda{{ cuda_major }}_py{{ py_version }}_{{ date_string }}_gh{{ GIT_DESCRIBE_HASH }}_gn{{ GIT_DESCRIBE_NUMBER }}}_ph{{ PKG_HASH }}
+  string: cuda{{ cuda_major }}_py{{ py_version }}_{{ date_string }}_gh{{ GIT_DESCRIBE_HASH }}_gn{{ GIT_DESCRIBE_NUMBER }}_ph{{ PKG_HASH }}
   ignore_run_exports_from:
     - {{ compiler('cuda') }}
     - cuda-cudart-dev

conda/recipes/libcucim/meta.yaml

@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: Copyright (c) 2021-2023, NVIDIA CORPORATION.
+# SPDX-FileCopyrightText: Copyright (c) 2021-2025, NVIDIA CORPORATION.
 # SPDX-License-Identifier: Apache-2.0
 
 {% set version = environ['RAPIDS_PACKAGE_VERSION'].lstrip('v') %}
@@ -16,7 +16,7 @@ source:
 
 build:
   number: {{ GIT_DESCRIBE_NUMBER }}
-  string: cuda{{ cuda_major }}_{{ date_string }}_gh{{ GIT_DESCRIBE_HASH }}_gn{{ GIT_DESCRIBE_NUMBER }}}_ph{{ PKG_HASH }}
+  string: cuda{{ cuda_major }}_{{ date_string }}_gh{{ GIT_DESCRIBE_HASH }}_gn{{ GIT_DESCRIBE_NUMBER }}_ph{{ PKG_HASH }}
   ignore_run_exports:
     - openslide
   ignore_run_exports_from: