Fix projection string in ABI L1b mapfiles

mapserver/abi_l1b_template.map

@@ -6,7 +6,7 @@ MAP
   EXTENT -5434894.885 -5434894.885 5434894.885 5434894.885
 
   PROJECTION
-    {{ projection }}
+    "{{ projection }}"
   END
 
   WEB
@@ -36,7 +36,7 @@ MAP
     # Comment below to default to transparency
     OFFSITE 0 0 0
     PROJECTION
-      {{ projection }}
+      "{{ projection }}"
     END
     METADATA
       "wms_title" "{{ platform_long_name }} ABI {{ product.replace('_', ' ').title() }}"