Treat SSL errors as not available (#605)

* Treat SSL errors as not available

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: jamesmyatt

grayskull/base/pkg_info.py

@@ -11,9 +11,13 @@ def is_pkg_available(pkg_name: str, channel: str = "conda-forge") -> bool:
     :param channel: Anaconda channel
     :return: Return True if the package is present on the given channel
     """
-    response = requests.get(
-        url=f"https://anaconda.org/{channel}/{pkg_name}/files", allow_redirects=False
-    )
+    try:
+        response = requests.get(
+            url=f"https://anaconda.org/{channel}/{pkg_name}/files",
+            allow_redirects=False,
+        )
+    except requests.exceptions.SSLError:
+        return False
     return response.status_code == 200