fix: ensure minimum python version of 2.6 for manta (#48973)

* fix: ensure minimum python version of 2.6 for manta

* see the minimum specification here: https://github.com/Illumina/manta/blob/75b5c38d4fcd2f6961197b28a41eb61856f2d976/docs/userGuide/installation.md?plain=1#L59
* also note, we had it installing a python version `1.6` in the snakemake wrapper: https://github.com/snakemake/snakemake-wrappers/pull/2114/files#diff-8b4a5764a647f4182cb9f49051b48b25e5b72e38365ec1311475134a3440ed76R7

* chore: bump build number

* fix: add run_exports

* fix: adjust run_exports syntax

* fix: actually set the name variable

recipes/manta/meta.yaml

@@ -1,19 +1,22 @@
+{% set name = "manta" %}
 {% set version = "1.6.0" %}
 
 package:
-  name: manta
-  version: '{{ version }}'
+  name: {{ name }}
+  version: {{ version }}
 
 source:
   url: https://github.com/Illumina/manta/releases/download/v{{ version }}/manta-{{ version }}.centos6_x86_64.tar.bz2
   sha256: ae19b1b934cf5bb605dfb58b29e8e2b843cb469ec5ff12441ca3d9d39179abf4
 
 build:
-  number: 2
+  number: 3
+  run_exports:
+    - {{ pin_subpackage(name, max_pin="x") }}
 
 requirements:
   run:
-    - python <3
+    - python >=2.6,<3
 
 test:
   commands: