Use quotes to specify versions

Author: oleksandr-pavlyk

conda-recipe/conda_build_config.yaml

@@ -1,5 +1,5 @@
 numpy:
-    - 1.23
+    - '1.23'
 c_compiler:                   # [linux]
     - gcc                     # [linux]
 cxx_compiler:                 # [linux]
@@ -9,7 +9,7 @@ cxx_compiler_version:         # [linux]
 c_stdlib:                     # [linux]
     - sysroot                 # [linux]
 c_stdlib_version:             # [linux]
-    - 2.28                    # [linux]
+    - '2.28'                  # [linux]
 c_stdlib:                     # [win]
     - vs                      # [win]
 cxx_compiler:                 # [win]