Add 3.15.0 release date and EOL date

<python/peps@574655a>

Author: jwodder

pyversion-info-data.json

@@ -262,7 +262,8 @@
         "3.13.10": "2026-06-09",
         "3.13.11": "2026-08-04",
         "3.13.12": "2026-10-06",
-        "3.14.0": "2025-10-07"
+        "3.14.0": "2025-10-07",
+        "3.15.0": "2026-10-01"
     },
     "series_eol_dates": {
         "0.9": true,
@@ -295,6 +296,7 @@
         "3.11": "2027-10-01",
         "3.12": "2028-10-01",
         "3.13": "2029-10-01",
-        "3.14": "2030-10-01"
+        "3.14": "2030-10-01",
+        "3.15": "2031-10-01"
     }
 }

pyversion-info-data.v1.json

@@ -1,5 +1,5 @@
 {
-    "last_modified": "2025-04-08T18:44:30+00:00",
+    "last_modified": "2025-04-30T12:49:35+00:00",
     "cpython": {
         "release_dates": {
             "0.9.0": "1991-02-20",
@@ -264,7 +264,8 @@
             "3.13.10": "2026-06-09",
             "3.13.11": "2026-08-04",
             "3.13.12": "2026-10-06",
-            "3.14.0": "2025-10-07"
+            "3.14.0": "2025-10-07",
+            "3.15.0": "2026-10-01"
         },
         "eol_dates": {
             "0.9": true,
@@ -297,7 +298,8 @@
             "3.11": "2027-10-01",
             "3.12": "2028-10-01",
             "3.13": "2029-10-01",
-            "3.14": "2030-10-01"
+            "3.14": "2030-10-01",
+            "3.15": "2031-10-01"
         }
     },
     "pypy": {