Fix typos and messages in CEL examples (#459)

I found a few copy issues while documenting these examples. This PR
fixes them.

---------

Co-authored-by: Timo Stamm <ts@timostamm.de>

Author: jrinehart-buf

examples/cel_field_selection.proto

@@ -24,7 +24,7 @@ service ApartmentService {
 
 message SearchApartmentRequest {
   option (buf.validate.message).cel = {
-    id: "secondary_address_after_primary_address"
+    id: "min_bedrooms_lte_max_bedrooms"
     message: "the minimum number of bedrooms cannot be higher than the maximum number"
     // In a message-level constraint, `this` refers to the message itself, the `SearchApartmentRequest`.
     // You can access a field with `this.field_name`.

examples/cel_repeated_field_exists_one.proto

@@ -29,7 +29,7 @@ message TeamRoster {
 
   message Player {
     string name = 1;
-    uint32 jersy_number = 2;
+    uint32 jersey_number = 2;
   }
 
   repeated Player players = 1;

examples/cel_string_is_ip.proto

@@ -24,7 +24,7 @@ service LocationService {
 message LocationForIpRequest {
   string ip_address = 1 [(buf.validate.field).cel = {
     id: "valid_address"
-    message: "."
+    message: "ip_address must be a valid IP address"
     // `some_string.isIp()` returns whether the string is a valid ip address.
     // `isIp(4)` returns whether a string is an ipv4 address.
     // `isIp(6)` returns whether a string is an ipv6 address.
@@ -41,7 +41,7 @@ message LocationForIpResponse {
 message LocationForIpPrefixRequest {
   string ip_prefix = 1 [(buf.validate.field).cel = {
     id: "valid_prefix"
-    message: "."
+    message: "ip_prefix must be a valid IP with prefix length"
     // `some_string.isIpPrefix()` returns whether the string is a valid ip with prefix length.
     // `isIpPrefix(4)` returns whether a string is an ipv4 with prefix length.
     // `isIpPrefix(6)` returns whether a string is an ipv6 with prefix length.

examples/cel_wrapper_type.proto

@@ -45,7 +45,7 @@ message SearchStoreRequest {
   // term is the search term
   google.protobuf.StringValue term = 1 [(buf.validate.field).cel = {
     id: "search_term_length"
-    message: "search term must be not exceed 100 characters"
+    message: "search term must not exceed 100 characters"
     // This validates that _if_ term is specified, it must be shorter than 100
     // characters long.
     // This rule is only evaluated when this field is specified, because
@@ -69,8 +69,8 @@ message SearchStoreRequest {
   google.protobuf.BoolValue in_stock = 3;
   // min_price is the minimum price that the search results should have.
   google.protobuf.FloatValue min_price = 4 [(buf.validate.field).cel = {
-    id: "min_price_finite"
-    message: "min_price_must_be_positive"
+    id: "min_price_positive"
+    message: "minimum price must be positive"
     // This validates that _if_ min_price is specified, it must be greater than 0.
     // This rule is only evaluated when this field is specified, because
     // google.protobuf.FloatValue is a message type, and CEL rules are evaluated