fix: Fix snap package building

This patch fixes the outdated snap package recipe to make the snap
buildable with the current Snapcraft release(7.3.1).

Signed-off-by: 林博仁(Buo-ren Lin) <Buo.Ren.Lin@gmail.com>

snap/snapcraft.yaml

@@ -13,13 +13,13 @@ description: |
 
 grade: stable # must be 'stable' to release into candidate/stable channels
 confinement: strict
+base: core22
 
 apps:
   tesseract:
-    command: >
+    command: usr/local/bin/tesseract
-      env
+    environment:
-      TESSDATA_PREFIX=$SNAP_USER_COMMON
+      TESSDATA_PREFIX: $SNAP_USER_COMMON
-      tesseract
     plugs:
       - home
       - removable-media
@@ -30,9 +30,9 @@ parts:
     plugin: autotools
     build-packages:
       - pkg-config
-      - libpng12-dev
+      - libpng-dev
-      - libjpeg8-dev
+      - libjpeg-dev
-      - libtiff5-dev
+      - libtiff-dev
       - zlib1g-dev
       - libicu-dev
       - libpango1.0-dev