Update Biosystems homepage and URL (#1155)

* Update Biosystems homepage and URL

* Fix JSON syntax

src/bioregistry/data/bioregistry.json

@@ -9920,6 +9920,14 @@
       "name": "Aron Marchler-Bauer",
       "orcid": "0000-0003-1516-0712"
     },
+    "contributor_extras": [
+      {
+        "email": "egon.willighagen@gmail.com",
+        "github": "egonw",
+        "name": "Egon Willighagen",
+        "orcid": "0000-0001-7542-0286"
+      }
+    ],
     "fairsharing": {
       "abbreviation": "BioSystems",
       "description": "The NCBI BioSystems database centralizes and cross-links existing biological systems databases, increasing their utility and target audience by integrating their pathways and systems into NCBI resources. The resource provides categorical information on genes, proteins and small molecules of biosystems.",
@@ -9939,6 +9947,7 @@
         "Systems Biology"
       ]
     },
+    "homepage": "https://www.ncbi.nlm.nih.gov/Structure/biosystems/docs/biosystems_about.html",
     "integbio": {
       "description": "This database is a collection of metabolic and signaling pathways in organisms, as well as interaction sets between biological molecules associated with disease and other biological processes. Each entry contains information including pathway maps, relevant citations, genes, proteins sequences, and data on compounds.",
       "fairsharing": "biodbcore-000430",
@@ -10011,7 +10020,7 @@
       "synonyms": [
         "bsid"
       ],
-      "uri_format": "http://www.ncbi.nlm.nih.gov/biosystems/$1"
+      "uri_format": "https://pubchem.ncbi.nlm.nih.gov/pathway/BSID:$1"
     },
     "publications": [
       {