retain-pdf: fix checkver

Author: ivaquero

bucket/edgeless.json

@@ -14,7 +14,7 @@
     ],
     "checkver": {
         "url": "https://down.edgeless.top/",
-        "regex": "([\\d\\.]+)"
+        "regex": "([\\d.\\d+])"
     },
     "autoupdate": {
         "url": "https://zfile.edgeless.top/d/Socket/Hub/Edgeless%20Hub_Beta_$version.7z?sign=1fM189Ys5KlNwgh8YwqmRoVMF8VeUGyWTmqDyqD2UHc=:0"

bucket/quickbib.json

@@ -20,7 +20,9 @@
             "QuickBib"
         ]
     ],
-    "checkver": "github",
+    "checkver": {
+        "github": "https://github.com/archisman-panigrahi/QuickBib"
+    },
     "autoupdate": {
         "architecture": {
             "64bit": {

bucket/retain-pdf.json

@@ -22,8 +22,7 @@
         ]
     ],
     "checkver": {
-        "github": "https://github.com/wxyhgk/retain-pdf",
-        "regex": "RetainPDF-([\\d.]+(?:-beta\\d+))-Setup\\.exe"
+        "github": "https://github.com/wxyhgk/retain-pdf/releases/latest"
     },
     "autoupdate": {
         "architecture": {