Normalize app names: pgAdmin 4 and Sourcetree (#46420)

Update display names for consistency/branding: change "pgAdmin4" to
"pgAdmin 4" in ee/maintained-apps/inputs/homebrew/pgadmin4.json and
ee/maintained-apps/outputs/apps.json, and change "SourceTree" to
"Sourcetree" in ee/maintained-apps/outputs/apps.json. These edits align
app names with official branding and ensure consistent naming across
input and output manifests.

ee/maintained-apps/inputs/homebrew/pgadmin4.json

@@ -1,5 +1,5 @@
 {
-  "name": "pgAdmin4",
+  "name": "pgAdmin 4",
   "unique_identifier": "org.pgadmin.pgadmin4",
   "token": "pgadmin4",
   "installer_format": "dmg",

ee/maintained-apps/outputs/apps.json

@@ -1710,7 +1710,7 @@
       "description": "Parallels Desktop is virtualization software."
     },
     {
-      "name": "pgAdmin4",
+      "name": "pgAdmin 4",
       "slug": "pgadmin4/darwin",
       "platform": "darwin",
       "unique_identifier": "org.pgadmin.pgadmin4",
@@ -2039,7 +2039,7 @@
       "description": "Snagit is screen capture software."
     },
     {
-      "name": "SourceTree",
+      "name": "Sourcetree",
       "slug": "sourcetree/darwin",
       "platform": "darwin",
       "unique_identifier": "com.torusknot.SourceTreeNotMAS",